-5a+7+6a=13-21

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Solution for -5a+7+6a=13-21 equation:


Simplifying
-5a + 7 + 6a = 13 + -21

Reorder the terms:
7 + -5a + 6a = 13 + -21

Combine like terms: -5a + 6a = 1a
7 + 1a = 13 + -21

Combine like terms: 13 + -21 = -8
7 + 1a = -8

Solving
7 + 1a = -8

Solving for variable 'a'.

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

Add '-7' to each side of the equation.
7 + -7 + 1a = -8 + -7

Combine like terms: 7 + -7 = 0
0 + 1a = -8 + -7
1a = -8 + -7

Combine like terms: -8 + -7 = -15
1a = -15

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

Simplifying
a = -15

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