SOLUTION: 4x+3x+x=12-5-9 8x=-2 x=-2/8

Question 4872: 4x+3x+x=12-5-9
8x=-2
x=-2/8
Found 3 solutions by ichudov, Scorinitron, zynan88:
Answer by ichudov(507)   (Show Source): You can put this solution on YOUR website!
4x+9+3x=12-x-5
move x to the left, numbers to the right
4x+3x+x = 12-5-9
8x=-2

Answer by Scorinitron(19)   (Show Source): You can put this solution on YOUR website!
4x+9+3x=12-x-5

Since 4x and 3x are like terms, add 3x to 4x to get 7x.
7x+9=12-x-5
Subtract 5 from 12 to get 7.
7x+9=7-x
Since -x contains the variable to solve for, move it to the left-hand side of the equation by adding x to both sides.
7x+9+x=7
Since 7x and x are like terms, add x to 7x to get 8x.
8x+9=7

Since 9 does not contain the variable to solve for, move it to the right-hand side of the equation by subtracting 9 from both sides.
8x=-9+7
Add 7 to -9 to get -2.
8x=-2
Divide each term in the equation by 8.
(8x)/(8)=-(2)/(8)
Simplify the left-hand side of the equation by canceling the common factors.
x=-(2)/(8)
Simplify the right-hand side of the equation by simplifying each term.

x=-(1)/(4)
Answer by zynan88(4)   (Show Source): You can put this solution on YOUR website!
4x+3x+x=12-5-9
8x=-2
x=-2/8
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