12x+7x=140-x

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Solution for 12x+7x=140-x equation: 


Simplifying
12x + 7x = 140 + -1x

Combine like terms: 12x + 7x = 19x
19x = 140 + -1x

Solving
19x = 140 + -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.
19x + x = 140 + -1x + x

Combine like terms: 19x + x = 20x
20x = 140 + -1x + x

Combine like terms: -1x + x = 0
20x = 140 + 0
20x = 140

Divide each side by '20'.
x = 7

Simplifying
x = 7

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