40=12x-7x

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Solution for 40=12x-7x equation:


Simplifying
40 = 12x + -7x

Combine like terms: 12x + -7x = 5x
40 = 5x

Solving
40 = 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.
40 + -5x = 5x + -5x

Combine like terms: 5x + -5x = 0
40 + -5x = 0

Add '-40' to each side of the equation.
40 + -40 + -5x = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -5x = 0 + -40
-5x = 0 + -40

Combine like terms: 0 + -40 = -40
-5x = -40

Divide each side by '-5'.
x = 8

Simplifying
x = 8

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