7-8x=42-x

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Solution for 7-8x=42-x equation:


Simplifying
7 + -8x = 42 + -1x

Solving
7 + -8x = 42 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
7 + -8x + x = 42 + -1x + x

Combine like terms: -8x + x = -7x
7 + -7x = 42 + -1x + x

Combine like terms: -1x + x = 0
7 + -7x = 42 + 0
7 + -7x = 42

Add '-7' to each side of the equation.
7 + -7 + -7x = 42 + -7

Combine like terms: 7 + -7 = 0
0 + -7x = 42 + -7
-7x = 42 + -7

Combine like terms: 42 + -7 = 35
-7x = 35

Divide each side by '-7'.
x = -5

Simplifying
x = -5

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