-31=a-12

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Solution for -31=a-12 equation:


Simplifying
-31 = a + -12

Reorder the terms:
-31 = -12 + a

Solving
-31 = -12 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-31 + -1a = -12 + a + -1a

Combine like terms: a + -1a = 0
-31 + -1a = -12 + 0
-31 + -1a = -12

Add '31' to each side of the equation.
-31 + 31 + -1a = -12 + 31

Combine like terms: -31 + 31 = 0
0 + -1a = -12 + 31
-1a = -12 + 31

Combine like terms: -12 + 31 = 19
-1a = 19

Divide each side by '-1'.
a = -19

Simplifying
a = -19

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