3-3a=15

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Solution for 3-3a=15 equation: 


Simplifying
3 + -3a = 15

Solving
3 + -3a = 15

Solving for variable 'a'.

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

Add '-3' to each side of the equation.
3 + -3 + -3a = 15 + -3

Combine like terms: 3 + -3 = 0
0 + -3a = 15 + -3
-3a = 15 + -3

Combine like terms: 15 + -3 = 12
-3a = 12

Divide each side by '-3'.
a = -4

Simplifying
a = -4

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