-7(-13+3x)=31-x

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Solution for -7(-13+3x)=31-x equation:


Simplifying
-7(-13 + 3x) = 31 + -1x
(-13 * -7 + 3x * -7) = 31 + -1x
(91 + -21x) = 31 + -1x

Solving
91 + -21x = 31 + -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.
91 + -21x + x = 31 + -1x + x

Combine like terms: -21x + x = -20x
91 + -20x = 31 + -1x + x

Combine like terms: -1x + x = 0
91 + -20x = 31 + 0
91 + -20x = 31

Add '-91' to each side of the equation.
91 + -91 + -20x = 31 + -91

Combine like terms: 91 + -91 = 0
0 + -20x = 31 + -91
-20x = 31 + -91

Combine like terms: 31 + -91 = -60
-20x = -60

Divide each side by '-20'.
x = 3

Simplifying
x = 3

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