7x-12=3x+40

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Solution for 7x-12=3x+40 equation:


Simplifying
7x + -12 = 3x + 40

Reorder the terms:
-12 + 7x = 3x + 40

Reorder the terms:
-12 + 7x = 40 + 3x

Solving
-12 + 7x = 40 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-12 + 7x + -3x = 40 + 3x + -3x

Combine like terms: 7x + -3x = 4x
-12 + 4x = 40 + 3x + -3x

Combine like terms: 3x + -3x = 0
-12 + 4x = 40 + 0
-12 + 4x = 40

Add '12' to each side of the equation.
-12 + 12 + 4x = 40 + 12

Combine like terms: -12 + 12 = 0
0 + 4x = 40 + 12
4x = 40 + 12

Combine like terms: 40 + 12 = 52
4x = 52

Divide each side by '4'.
x = 13

Simplifying
x = 13

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