7a+8a=-15

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


Simplifying
7a + 8a = -15

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

Solving
15a = -15

Solving for variable 'a'.

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

Divide each side by '15'.
a = -1

Simplifying
a = -1

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