Questions on Algebra: Equations answered by real tutors!

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Question 70698: Determine the best method to solve each system of equations. Then solve the system.
2x+y=3x-15
x+5=4y+2x
I have (18 1/3, -3 1/2)
Is this correct. Thanks
Click here to see answer by checkley75(3666)

Question 70764: what is
(x+3)*4
Click here to see answer by Quackpot rocks(6)

Question 70420: Solve:
4(x + 2) - 3x = x - 6
I have three choices which have confused me:
a)Identity
b) No solution
c) 0
What does the identity mean? Thank you
Click here to see answer by Quackpot rocks(6)

Question 70769: I'm lost with this question. Can you help?
One side of a triangle is 2/3rds as long as the second side and the second side is 2/3rds as long as the third side. The perimeter = 95cm. What is the length of the longest side?
Would the equation be:
95 = X + (X x 2/3) + (X x 2/3)2/3
Is X the longest side and how do I find X?

Click here to see answer by checkley75(3666)

Question 70685: Adult tickets to the school musical are $5 and student tickets are $2. There are 300 seats in the auditorium where the musical is being performed. The goal for ticket sales for one performance is at least $900. Make a graph showing the number of each kind of ticket needed to be sold to reach the goal. List three possible solutions.
Is this correct?
y<-x+300
y>-5/3x=300
Thanks
Click here to see answer by ankor@dixie-net.com(22740)

Question 70849: How do you change fractions into decimals?
Click here to see answer by checkley75(3666)

Question 70903: Hi. How do you show the steps and solve this:
4X+2(x-1)= -20
Click here to see answer by stanbon(75887)

Question 70902: 2(p-3)+6=4p-10
Click here to see answer by bucky(2189)

Question 70923: hey
is 6-2(5-y)=6-10+2y true or false?
thanks
Click here to see answer by bucky(2189)

Question 70848: How do you use tiles to solve a division and subtraction algebra equation?
Click here to see answer by mathman409(67)

Question 70930: Can you please help me with these simultaneous equations. I don't understand what I have to do. Thank you.
2x + y = 21
x - y = 6
and
u + v = 8
4u - v = 17
Click here to see answer by checkley75(3666)

Question 70955: I have 2 more simultaneous questions that I need help with please. Very confused. Thank you
5x+y=19
2x-y=2
and
6x+7=20
3x+y=11
Click here to see answer by mathman409(67)

Question 70990: Is this correct?
4/5a<-12
a<-15
Click here to see answer by jim_thompson5910(35256)

Question 70989: Not in book.
Jim's brakes charges $25 for parts and $55 per hour to fix the brakes on a car. Myron's Auto charges $40 for parts and $30 per hour to do the same job. What length of job in hours would have the smae cost of both shops?
Thank you for helping me. I hate written problems
Click here to see answer by jim_thompson5910(35256)

Question 71002: I have a problem with the equation two-step problems, they seem to confuse me alot. I'm not sure what side to start from or where to end. How do I know when I have the right answer?
Click here to see answer by stanbon(75887)

Question 71037: I'm not sure that I have done this correctly. I substituted the answer for X and the equation is false. Can you tell me where I went wrong?
X/6 + 2X/3 = X/2 + 3 (move variable left)
X/6 + 2X/3 - X/2 = 3
X/6 + 4X/6 - 3X/6 = 3 (find LCD)
2X/6 = 3
X = 3 x 6/2
X = 9
Click here to see answer by stanbon(75887)

Question 71020: Can you please help solve this problem...instructions...complete the ordered paris for the equation y = 3x+3...( ,0), (1/3, ), (0, ), (-1/3, )
Click here to see answer by stanbon(75887)

Question 71017: 2/3x+12 - 4/3 = 2/x+4
Click here to see answer by stanbon(75887)

Question 71105: I'm having some trouble solving this question, some help would be appreciated!
Problem:
3x + 7 = x^2 + k = 7x + 15
What's the value of k?
Click here to see answer by checkley75(3666)

Question 71120: I need help solving an equation by removing the parentheses: Here's one question-- 5(x + 9)=7-(x - 4).
Click here to see answer by checkley75(3666)

Question 71107: 3x + 7 = x^2 + k = 7x + 15
That's the question. It has 2 (=) signs, how do you solve for k?
Click here to see answer by checkley75(3666)

Question 71132: Find values for m and b in the following system so that the solution to the system is (-3,4).
5x + 7y = b
mx + y = 22
Click here to see answer by ptaylor(2198)

Question 71013: Solve the following systems by substitution.
8x - 4y = 16
y = 2x - 4
Click here to see answer by ptaylor(2198)

Question 71133: how do I solve the following formula:
4X Squared + 70X = -150
thank you

Click here to see answer by checkley75(3666)

Question 71004: CAN YOU PLEASE HELP ME SOLVE THESE EQUATIONS? 3X+2Y=17, 84-18X=10X, 4(x+8)=6x-2 AND 4(7+5)
_____
2+1 THANKS IN ADVANCE!
Click here to see answer by elima(1433)

Question 71160: How do I solve the following equation for "T"?
F=1/T

Click here to see answer by ptaylor(2198)

Question 69977: describe the transformation from
Y=f(x) to Y=f(x-7)
Click here to see answer by Smirnov(15)

Question 69362: John's three year home improvement loan is to be repaid in monthly installments of $375.90 each. If the annual rate (as simple interest) is 14.4%, what is the principal of the loan.
Click here to see answer by Smirnov(15)

Question 71259: I am having problems solving first degree equations in my pre-algebra math book.One of the problems is like this.6z - 1/3 =5/3 .If you could please help me by any way of understanding this problem and how to solve with fractions cause I keep getting 1/6 and the book seys that it is 1/3.THANK YOU VERY MUCH
Click here to see answer by sudhir(14)

Question 71258: S=c/1-m; solve for m
Click here to see answer by Earlsdon(6294)

Question 71292: I need help with a word problem:
If you have 50 feet of fence, What shape would be best to maximize the most roaming area for your new puppy. Not sure how to figure this one out. Can you please help!!
Click here to see answer by checkley75(3666)

Question 71323: 3b+2c=46
-5c+b=-11
Click here to see answer by checkley75(3666)

Question 71395: Solve: 3x(to the 2nd power) - 2x - 4 = 0
Please show work and solution.
Click here to see answer by bucky(2189)

Question 71396: Combine: (3/x(to the 2nd) + 3x - 4) - (4/x(to the 2nd) - 6x - 40)
Please show work and solution
Click here to see answer by bucky(2189)

Question 71394: Find the equation of the line going through the points (-6,7) and (2,2).
Please show work and solution.
Click here to see answer by ankor@dixie-net.com(22740)

Question 71455: 2 (x+4)= 3x
Just looking for an example close to this.
I got as far as...
2x + 8 = 3x
then do I subtract 2x from each side or 8?
Click here to see answer by checkley75(3666)

Question 71455: 2 (x+4)= 3x
Just looking for an example close to this.
I got as far as...
2x + 8 = 3x
then do I subtract 2x from each side or 8?
Click here to see answer by ptaylor(2198)

Question 71454:
DECIDE WHICH OF THE TWO POINTS IS A SOLUTION OF THE EQUATION.
X+Y=8
A.(2,4)
B.(2,6)

Click here to see answer by checkley75(3666)

Question 71463: Question: -2 (y + 6) = y + 3 + 2y
- 2y - 12 = 3y + 3
+ 2y + 2y
-----------------------
- 12 = 5y + 3
- 3 - 3
-----------------------
- 9 = 5y Do I divide 5 on each side from here?
I got 1.8 = y ???

Click here to see answer by Earlsdon(6294)

Question 71511: 5/12 5/2
=
5/3 k
what is the answer to k?

Click here to see answer by stanbon(75887)

Question 71494: how do you do 26cm/s=______m/min

Click here to see answer by stanbon(75887)

Question 71497: -a-10-8=-24
Click here to see answer by checkley75(3666)

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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