Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 261812: x^2-x-6
_______=
x^2-4
Click here to see answer by Fombitz(32388)

Question 261894: evaluate 9d+7e when d=-2 ande=4
Click here to see answer by solver91311(24713)

Question 261931: I am trying to help my son with his homework and am stuck!
We need to find the solution for this problem:
2/c^2-2c + 1/2-c=1
Click here to see answer by dabanfield(803)

Question 261931: I am trying to help my son with his homework and am stuck!
We need to find the solution for this problem:
2/c^2-2c + 1/2-c=1
Click here to see answer by richwmiller(17219)

Question 261931: I am trying to help my son with his homework and am stuck!
We need to find the solution for this problem:
2/c^2-2c + 1/2-c=1
Click here to see answer by solver91311(24713)

Question 262063: how would i find the answer to 8n^2+4=12n
? i subtracted the 12n and got 8n^2-12n+4=0
after that i did the gcf and got 4(2n^2-3n+1)=0 and then i got stuck
Click here to see answer by richwmiller(17219)

Question 262071: my daughter is having a difficult time with math. I would like to help, but it has been many years. How do you find solution for:
x=2y +7
x=y +4

Click here to see answer by richwmiller(17219)

Question 262069: the sum of the digits of a two-digit number is 14. if the digits are reversed, the new number is 18 less than the original number. find original number
Click here to see answer by palanisamy(496)

Question 262068: 0.08t+28.3=0.5t-9.5
Click here to see answer by richwmiller(17219)

Question 262068: 0.08t+28.3=0.5t-9.5
Click here to see answer by rfer(16322)

Question 262223: I'm not sure what type of equation this is, but I need help on how the answer was found. I am taking an SAT soon, and this is an example in my test booklet. I don't know how they found the answers for these equations, can you please help me find out how to find the answer on my own?
Question:
What value of X satisfies both of the equations below?
|4x-7|=5 and |3-8x|=1
Since |4x-7|=5, the value of 4x-7 is either 5 or -5.
4x-7=5 4x-7=-5
4x=12 Or 4x=2
x=3 x=1/2
(I don't see how 4x=12, x=3, 4x=2, etc...)
Since |3-8x|=1, the value of 3-8x is either 1 or -1.
3-8x=1 3-8x=-1
8x=2 Or 8x=4
x=1/4 x=1/2
(again, I don't know how they got the answers for
the equations.)
The two values of x that satisfy the second equation are 1/4 and 1/2. You are asked to find the value of x that satisfies BOTH equations. That value is 1/2. The answer can be entered in the grid as 1/2 or .5.
I would appreciate some help on how they found the answers for the equations because I have no idea how this was answered.

Click here to see answer by drk(1908)

Question 262342: 3-2(8-5)squared. the correct answer is
Click here to see answer by checkley77(12844)

Question 262430: I need help finding the equation for the line.
(8,5) and m=5
Thanks
Click here to see answer by checkley77(12844)

Question 262454: Could you help me find the x intercept, y intercept, and slope for this equation: -1/4x + 3
Thanks
Click here to see answer by richwmiller(17219)

Question 262448: Can you help me find the equation for the line?
(2,-5) and (0,4)
Could you explain it too?
Thank you
Click here to see answer by scott8148(6628)

Question 262533: if i sold brownies for 3.00 and cookies for 2.50 i sold 3 less cookies and the total is 218.00. ive been working on this for an hour along with my parents. we just want the equation.
Click here to see answer by richwmiller(17219)

Question 262592: Hi,
I am trying to help my nieces with their homework, but I don't have much information to go by and it has been awhile since I played with equations.
Anyhow, maybe one of you know more what about what they are looking for or at least give me a clue.
I think they are trying to find the equation that by replacing the value IN, the result should match the OUT.
e.g. X + Y = Z (Where X=IN, & Z=OUT) makes sense? sorry if it doesn't.
I know is hard to pick from very little information.
:)
IN OUT
2 -1
3 +1
10 +15
15 +25
5 +7
Thanks a lot

Click here to see answer by richwmiller(17219)

Question 262619: the perimeter of a rectangle is 86m. The length is 7m more than the width. Find the dimensions.
Click here to see answer by mananth(16946)

Question 262653: x^2+6x+5=0
Click here to see answer by jim_thompson5910(35256)

Question 262822: After solving a system of equations in two variables you surmise a solution, (x,y). How can you determine if the solution is correct?
Click here to see answer by drk(1908)

Question 262823: Specifically, how would the system of equation be presented before soving it?
Click here to see answer by Alan3354(69443)

Question 262883: solve for variable 2y/3=8
Click here to see answer by palanisamy(496)

Question 262959: can anyone help me solve this problem? 19(x/8) Please help my assignment is late.
Thank you in advance
Deborah
Click here to see answer by mananth(16946)

Question 263016: Could you please help me solve for X and state the restrictions on the variables: bx+a=dx+c ? Every time I tried I always ended up with my x's being canceled because I couldn't figure out what I was doing wrong when I divided by both b and d.
Click here to see answer by richwmiller(17219)

Question 263104: Need help :/.
( x/x+2)^2 = 4x/x+2 -4
Thanks :)
Click here to see answer by drk(1908)

Question 263102: I cant seem to solve this equation.. PLease help :)
x+2/x
------- = 5x
3+4/x
Thank u :)
Click here to see answer by drk(1908)

Question 263102: I cant seem to solve this equation.. PLease help :)
x+2/x
------- = 5x
3+4/x
Thank u :)
Click here to see answer by josmiceli(19441)

Question 263219: I am not sure how to answer this...I have never been good at it would you please help me with this problem
A=p(l+rt) solve for t
thank you
pam
Click here to see answer by stanbon(75887)

Question 263257: Please solve 6-4x=6x-8x-4
Click here to see answer by jim_thompson5910(35256)

Question 263280: Given the equations 3x + y = 17, 5y + z = 14 and 3x + 5z = 41, what is the value of the sum x + y + z?
Click here to see answer by mananth(16946)

Question 263280: Given the equations 3x + y = 17, 5y + z = 14 and 3x + 5z = 41, what is the value of the sum x + y + z?
Click here to see answer by richwmiller(17219)

Question 263316: solve for u, where u is a real number square cube root u+22=2
Click here to see answer by Alan3354(69443)

Question 263322: Write the equation of the line that passes through the given point and is perpendicular to the given line. Write the answer in slope-intercept form.
(-6,8), y + 2 x = -13
y= ?
Click here to see answer by Alan3354(69443)

Question 263331: 1. 6 + 5x = 2x- 2/3
Click here to see answer by mananth(16946)

Question 263416: solve the following equations for the variables.
6x-2=22

Click here to see answer by richwmiller(17219)

Question 263453: divide: (1 1/2 + 3/4) divide (3 1/4 - 1)
this is what I got but each time i try..i get different answers:
(3/2 + 3/4) divide (13/12 - 1/1) LCD= 12
(18 + 9) x (13-12)
27x1
answer= 27
is this correct?
Click here to see answer by drk(1908)

Question 263499: Hello, i'm trying to solve my problem. I'm using solving sytems using elimination. The problem is, 4x=-2y=1 and below that is 2x=y=4
Click here to see answer by oberobic(2304)

Question 263587: p-1=5p+3p-8
Click here to see answer by monkeyboi(1)

Question 263290: Joe bought a pumpkin that cost 10 cents more per pound than his sister�s. Together, the two pumpkins weighed 20 pounds, but Joe�s pumpkin was heavier. Joe paid $3.52, and his sister paid $0.48. How many pounds did Joe�s pumpkin weigh?
Click here to see answer by richwmiller(17219)

Question 263595: 3x+4+1/2(4x-1)=-3/2
Click here to see answer by rfer(16322)

Question 263727: I need to figure out how to solve for x in this problem:
(x+1)/(x+1) + (5)/(x+2) = (3)/(x+1)

Click here to see answer by JBarnum(2146)

Question 263727: I need to figure out how to solve for x in this problem:
(x+1)/(x+1) + (5)/(x+2) = (3)/(x+1)

Click here to see answer by unlockmath(1688)

Question 263723: n^2+5 for n=3 and m=7
m
Click here to see answer by JBarnum(2146)

Question 263812: 2x+3y+4=0 what is y

Click here to see answer by mananth(16946)

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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