31-2a=-2

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Solution for 31-2a=-2 equation: 


Simplifying
31 + -2a = -2

Solving
31 + -2a = -2

Solving for variable 'a'.

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

Add '-31' to each side of the equation.
31 + -31 + -2a = -2 + -31

Combine like terms: 31 + -31 = 0
0 + -2a = -2 + -31
-2a = -2 + -31

Combine like terms: -2 + -31 = -33
-2a = -33

Divide each side by '-2'.
a = 16.5

Simplifying
a = 16.5

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