40+(3x)=12-x

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Solution for 40+(3x)=12-x equation:


Simplifying
40 + (3x) = 12 + -1x

Solving
40 + (3x) = 12 + -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.
40 + (3x) + x = 12 + -1x + x

Combine like terms: (3x) + x = 4x
40 + 4x = 12 + -1x + x

Combine like terms: -1x + x = 0
40 + 4x = 12 + 0
40 + 4x = 12

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

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

Combine like terms: 12 + -40 = -28
4x = -28

Divide each side by '4'.
x = -7

Simplifying
x = -7

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