12+7x=40

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Solution for 12+7x=40 equation: 


Simplifying
12 + 7x = 40

Solving
12 + 7x = 40

Solving for variable 'x'.

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

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

Combine like terms: 12 + -12 = 0
0 + 7x = 40 + -12
7x = 40 + -12

Combine like terms: 40 + -12 = 28
7x = 28

Divide each side by '7'.
x = 4

Simplifying
x = 4

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