SOLUTION: Solve for x: 3/5(x+2)=x-4 Please solve it and show how you did because I can't remember how to solve it. Thanks.

Algebra ->  Equations -> SOLUTION: Solve for x: 3/5(x+2)=x-4 Please solve it and show how you did because I can't remember how to solve it. Thanks.       Log On


   



Question 757568: Solve for x: 3/5(x+2)=x-4
Please solve it and show how you did because I can't remember how to solve it.
Thanks.

Found 3 solutions by Cromlix, Alan3354, Edwin McCravy:
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
3/5(x+2)=x-4
Multiply out
3/5x + 6/5 = x - 4
Collect like terms
remembering to change signs
as you cross the equal sign.
3/5x - x = -4 - 6/5
(x = 5/5x and -4 = -20/5)
-2/5x = -26/5
Cross multiply
-10x = -130
Divide both sides by -10
x = 13.
Proof:
3/5(x+2)=x-4
3/5(13 + 2) = 13 - 4
3/5(15) = 9
9 = 9 Proved
Hope this helps.
:-)

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Solve for x: 3/5(x+2)=x-4
--------------
Assuming you mean
(3/5)(x+2)=x-4 and not 3%2F%285%28x%2B2%29%29
Multiply by 5 to eliminate fractions
3(x+2)= 5(x-4) = 5x-20
3x + 6 = 5x - 20
2x = 26
x = 13

Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!
3%2F5(x + 2) = x - 4

Clear of fractions by multiplying both sides by 5

5[3%2F5(x + 2)] = 5(x - 4)

Cancel the 5's on the left.  Distribute the 5 on the right:

cross%285%29[3%2Fcross%285%29(x + 2)] = 5x - 20

3(x + 2) = 5x - 20
  3x + 6 = 5x - 20
     -2x = -26
       x = 13


Checking:

 3%2F5(x + 2) = x - 4
3%2F5(13 + 2) = 13 - 4
3%2F5(15) = 9
3%2Fcross%285%29%22%22%2A%22%22%22%22%5E3cross%28%2815%29%29 = 9
9 = 9     

      
Edwin