7a+15=0

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Solution for 7a+15=0 equation: 


Simplifying
7a + 15 = 0

Reorder the terms:
15 + 7a = 0

Solving
15 + 7a = 0

Solving for variable 'a'.

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

Add '-15' to each side of the equation.
15 + -15 + 7a = 0 + -15

Combine like terms: 15 + -15 = 0
0 + 7a = 0 + -15
7a = 0 + -15

Combine like terms: 0 + -15 = -15
7a = -15

Divide each side by '7'.
a = -2.142857143

Simplifying
a = -2.142857143

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