Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 13903: Find all positive integer values of x and y that satisfy the equation 1 over x+x over y+1 over xy=1.
Click here to see answer by khwang(438)

Question 14382: systms of linear equations an problem solving the substituition method
3s-4t=14
5s+t=8
Click here to see answer by elima(1433)

Question 14373: log (1 + cos x + i sin x)/(cos x � 1 � i sin x)
Click here to see answer by khwang(438)

Question 14446: please help me solve this equation 5x^2 + 33x -14 = 0 i know the answer is 0.4 but dont know how to show this or to work it out the proper way
Click here to see answer by Earlsdon(6294)

Question 14584: Three times the first of two numbers decreased by the second number equals 9. Twice the first number increased by the second number equals 11. Find the two numbers. I need a system of equations to solve the problem.
Click here to see answer by Earlsdon(6294)

Question 14600: hi can you please help me solve this. one of the other tutors helped me with this but i got confused with his/her answer.
it says substitute x= -4 and y= -15 to find the value of the expression.
-3 (4x - y)
thank you

Click here to see answer by longjonsilver(2297)

Question 14598: hi can you please help me solve this equation.
it says use the rule y= 3x cubed - 10 to complete the table. i know that one of your tutors already solved this for me but i accidently put squared instead of cubed and my computer wont let me write back to that tutor.
then it has
x y
2
1
0
10
5
y is left blank because i have to fill it out.
i have already tried some of these and for the answers i got
2/206
1/17
0/ -10
im not sure if they are right.
Click here to see answer by glabow(165)

Question 14682: 5b + 15
Click here to see answer by elima(1433)

Question 14744: Equations with variables
3/2y - y = 4 + 1/2y
Do not know where to begin. I believe I would start by simplifying first portion of problem. Would I subtract 3/2y from 1/1y? Clueless.
Click here to see answer by rahman(247)

Question 14730: negative three equals n over seven

Click here to see answer by Alwayscheerful(414)

Question 14687: What are the x- and y-intercepts for the following equation: 2x+3y=6. Tell how to find each intercept.
Click here to see answer by venugopalramana(3286)

Question 14846: value of 4 to the second power + 2/3
Click here to see answer by jb007mi6(53)

Question 14864: x^2-9x+20=
Click here to see answer by jb007mi6(53)

Question 14880: (f+5) + (-2) = 6
Click here to see answer by jb007mi6(53)

Question 14894: What is the answer to -1=4 + n
Click here to see answer by elima(1433)

Question 14916: Twice the greater of two consecutive odd intgers is 13 less than three times the lesser. Find the integers.
Click here to see answer by elima(1433)

Question 14354: Find an equation of the line (in either general form or slope intercept form) that contains the centers of the following two circles:
x^2+y^2-4x+6y+4 = 0 and x^2+y^2+6x+4y+9 = 0
Click here to see answer by venugopalramana(3286)

Question 14356: Find the equation of the verticle line that contains the point (4,-5). Express answer in general form or slope-intercept form.
Click here to see answer by venugopalramana(3286)

Question 14795: what is the answer to 8x-5=7x+7
Click here to see answer by bonster(299)

Question 14729: solve each equation : k over negative five equals negative five
Click here to see answer by bonster(299)

Question 15092: Given C=1-A/a; solve for A and a
Click here to see answer by bam878s(77)

Question 15191: can you please help me figure this one out?
2.4 b+ 5.6= -11.2
please show so i'll know how u did it. thank you for your help
Click here to see answer by elima(1433)

Question 15340: please help me with this...

5 (t- 0.4) + 6t =0
will you show me how you did it?
Click here to see answer by rahman(247)

Question 15339: please help me with this...
12p - 6.5p + 7 = -15

will you show me how you did it?
Click here to see answer by rahman(247)

Question 15338: please help me with this...
1.2c + 2.6c =4.56
will you show me how you did it?
Click here to see answer by LilSkittleMd(119)

Question 15326: please help me solve this.
2/3 (a-3)= -1/3
please show me how you do it..
Click here to see answer by LilSkittleMd(119)

Question 15327: please help me with this.
2/7n + n = 5/9
will you show me how you did it?
Click here to see answer by LilSkittleMd(119)

Question 15177: I have two equations. The answers for both X & Y are the same. I have tried to figure it out and have been unable to get the answer. Here are the equations.
2x + 3y = 33
x + 5y = 27
Click here to see answer by LilSkittleMd(119)

Question 15336: please help me with this...
0.9x + 2.3x = -6.4
will you show me how you did it?
Click here to see answer by LilSkittleMd(119)

Question 15328: please help me with this.
8- w/10 =3/5
will you show me how you did it?
Click here to see answer by LilSkittleMd(119)

Question 15328: please help me with this.
8- w/10 =3/5
will you show me how you did it?
Click here to see answer by rapaljer(4671)

Question 15465: The problem i have is that i cannot figure out what number to use the addition or subtraction rule on. How do i know?
This is the equation:
4 + 3x - 6 = 3x + 2 - x
Please help if you are willing
Click here to see answer by jessicawhidden(3)

Question 15464: please help me with this?
0.4 (a+2) =2
will you explane it to me please?
Click here to see answer by pwac(253)

Question 15463: please help me with this?
4x + 2 = -28.4
will you explane it to me please?
Click here to see answer by pwac(253)

Question 15518: I'm not sure how to figure questions like this one 3x+4=7out.
Click here to see answer by pwac(253)

Question 15563: can I please get help with this one Solve for x for y=0
Click here to see answer by Dont_Understand(8)

Question 15657: i'm a dad here and i need to know how to breakdown this one problem....i think from there i can refresh my memory.
3x+6=24 thanks..ernie perez
Click here to see answer by Dont_Understand(8)

Question 15656: Problem #1: An auto repair bill was $325. This included $85 for parts and $48 an hour for labor. How many hours of labor did the job require?
I realize that 325 minus 85 is 240 and that there would be 5 hours of labor for the job (I think). However, I do not know how to show this written out.
Problem #2: The pressure at a certain depth in the ocean can be approximated by the equation P = 15 + 1/2 D, where P is the pressure in pounds per square inch and D is the depth in feet. Use this equation to find the depth when the pressure is 40 lb/in^2.
Click here to see answer by Dont_Understand(8)

Question 15627: m+5(m-1)=11
Click here to see answer by pwac(253)

Question 15709: solve by factoring: 5x^2-2=3x
I can't figure this one out, can you please help
Click here to see answer by schragermath(3)

Question 15854: 50(x-1)=40x
Click here to see answer by rahman(247)

Question 15906: 5x +2 = 3x + 10
Sol'n:
5x+2=3x+10
5x-3x=10-2
2x=8
2x/2=8/2
x=4
Therefore the sol'n is x=4
Click here to see answer by Maricel Balos(8)

Question 15916: Please could you help me with my homework as i am really stuck! Thanks! Here are the questions-
7x +1 = 4x +19
6x -4 = 3x +8
9x -3 = 7x +23
8x- 11= 2x +25
5x +1 = x +13
Thanks
Click here to see answer by pwac(253)

Question 15973: five times the opposite of a number was increased by 25. This was exactly 90 greater than 8 times the number. What was the number?
Click here to see answer by elima(1433)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 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23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 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36721..36765, 36766..36810, 36811..36855, 36856..36900, 36901..36945, 36946..36990, 36991..37035, 37036..37080, 37081..37125, 37126..37170, 37171..37215, 37216..37260, 37261..37305, 37306..37350, 37351..37395, 37396..37440, 37441..37485, 37486..37530, 37531..37575, 37576..37620, 37621..37665, 37666..37710, 37711..37755, 37756..37800, 37801..37845, 37846..37890, 37891..37935, 37936..37980, 37981..38025, 38026..38070, 38071..38115, 38116..38160, 38161..38205, 38206..38250, 38251..38295, 38296..38340, 38341..38385, 38386..38430, 38431..38475, 38476..38520, 38521..38565, 38566..38610, 38611..38655, 38656..38700, 38701..38745, 38746..38790, 38791..38835, 38836..38880, 38881..38925, 38926..38970, 38971..39015, 39016..39060, 39061..39105, 39106..39150, 39151..39195, 39196..39240, 39241..39285, 39286..39330, 39331..39375, 39376..39420, 39421..39465, 39466..39510, 39511..39555, 39556..39600, 39601..39645, 39646..39690, 39691..39735, 39736..39780, 39781..39825, 39826..39870, 39871..39915, 39916..39960, 39961..40005, 40006..40050, 40051..40095, 40096..40140, 40141..40185, 40186..40230, 40231..40275, 40276..40320, 40321..40365, 40366..40410, 40411..40455, 40456..40500, 40501..40545, 40546..40590, 40591..40635, 40636..40680, 40681..40725, 40726..40770, 40771..40815, 40816..40860, 40861..40905, 40906..40950, 40951..40995, 40996..41040, 41041..41085, 41086..41130, 41131..41175, 41176..41220, 41221..41265, 41266..41310, 41311..41355, 41356..41400, 41401..41445, 41446..41490, 41491..41535, 41536..41580