-7-8=-x-4x

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Solution for -7-8=-x-4x equation:


Simplifying
-7 + -8 = -1x + -4x

Combine like terms: -7 + -8 = -15
-15 = -1x + -4x

Combine like terms: -1x + -4x = -5x
-15 = -5x

Solving
-15 = -5x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '5x' to each side of the equation.
-15 + 5x = -5x + 5x

Combine like terms: -5x + 5x = 0
-15 + 5x = 0

Add '15' to each side of the equation.
-15 + 15 + 5x = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 5x = 0 + 15
5x = 0 + 15

Combine like terms: 0 + 15 = 15
5x = 15

Divide each side by '5'.
x = 3

Simplifying
x = 3

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