-8+3a=28

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Solution for -8+3a=28 equation: 


Simplifying
-8 + 3a = 28

Solving
-8 + 3a = 28

Solving for variable 'a'.

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

Add '8' to each side of the equation.
-8 + 8 + 3a = 28 + 8

Combine like terms: -8 + 8 = 0
0 + 3a = 28 + 8
3a = 28 + 8

Combine like terms: 28 + 8 = 36
3a = 36

Divide each side by '3'.
a = 12

Simplifying
a = 12

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