7a+3a=-15-5a

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Solution for 7a+3a=-15-5a equation: 


Simplifying
7a + 3a = -15 + -5a

Combine like terms: 7a + 3a = 10a
10a = -15 + -5a

Solving
10a = -15 + -5a

Solving for variable 'a'.

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

Add '5a' to each side of the equation.
10a + 5a = -15 + -5a + 5a

Combine like terms: 10a + 5a = 15a
15a = -15 + -5a + 5a

Combine like terms: -5a + 5a = 0
15a = -15 + 0
15a = -15

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

Simplifying
a = -1

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