12+9a=75

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Solution for 12+9a=75 equation: 


Simplifying
12 + 9a = 75

Solving
12 + 9a = 75

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + 9a = 75 + -12

Combine like terms: 12 + -12 = 0
0 + 9a = 75 + -12
9a = 75 + -12

Combine like terms: 75 + -12 = 63
9a = 63

Divide each side by '9'.
a = 7

Simplifying
a = 7

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