3a-3b=-15

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Solution for 3a-3b=-15 equation: 


Simplifying
3a + -3b = -15

Solving
3a + -3b = -15

Solving for variable 'a'.

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

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

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

Divide each side by '3'.
a = -5 + b

Simplifying
a = -5 + b

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