-28+15-22a=31

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Solution for -28+15-22a=31 equation: 


Simplifying
-28 + 15 + -22a = 31

Combine like terms: -28 + 15 = -13
-13 + -22a = 31

Solving
-13 + -22a = 31

Solving for variable 'a'.

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

Add '13' to each side of the equation.
-13 + 13 + -22a = 31 + 13

Combine like terms: -13 + 13 = 0
0 + -22a = 31 + 13
-22a = 31 + 13

Combine like terms: 31 + 13 = 44
-22a = 44

Divide each side by '-22'.
a = -2

Simplifying
a = -2

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