-30a+21=-15

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Solution for -30a+21=-15 equation: 


Simplifying
-30a + 21 = -15

Reorder the terms:
21 + -30a = -15

Solving
21 + -30a = -15

Solving for variable 'a'.

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

Add '-21' to each side of the equation.
21 + -21 + -30a = -15 + -21

Combine like terms: 21 + -21 = 0
0 + -30a = -15 + -21
-30a = -15 + -21

Combine like terms: -15 + -21 = -36
-30a = -36

Divide each side by '-30'.
a = 1.2

Simplifying
a = 1.2

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