7a-3+8a=-15

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Solution for 7a-3+8a=-15 equation:


Simplifying
7a + -3 + 8a = -15

Reorder the terms:
-3 + 7a + 8a = -15

Combine like terms: 7a + 8a = 15a
-3 + 15a = -15

Solving
-3 + 15a = -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 + 15a = -15 + 3

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

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

Divide each side by '15'.
a = -0.8

Simplifying
a = -0.8

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