-31-7x=-3+21

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Solution for -31-7x=-3+21 equation: 


Simplifying
-31 + -7x = -3 + 21

Combine like terms: -3 + 21 = 18
-31 + -7x = 18

Solving
-31 + -7x = 18

Solving for variable 'x'.

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

Add '31' to each side of the equation.
-31 + 31 + -7x = 18 + 31

Combine like terms: -31 + 31 = 0
0 + -7x = 18 + 31
-7x = 18 + 31

Combine like terms: 18 + 31 = 49
-7x = 49

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

Simplifying
x = -7

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