7a+13-9a=8a-3a-8

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Solution for 7a+13-9a=8a-3a-8 equation:


Simplifying
7a + 13 + -9a = 8a + -3a + -8

Reorder the terms:
13 + 7a + -9a = 8a + -3a + -8

Combine like terms: 7a + -9a = -2a
13 + -2a = 8a + -3a + -8

Reorder the terms:
13 + -2a = -8 + 8a + -3a

Combine like terms: 8a + -3a = 5a
13 + -2a = -8 + 5a

Solving
13 + -2a = -8 + 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.
13 + -2a + -5a = -8 + 5a + -5a

Combine like terms: -2a + -5a = -7a
13 + -7a = -8 + 5a + -5a

Combine like terms: 5a + -5a = 0
13 + -7a = -8 + 0
13 + -7a = -8

Add '-13' to each side of the equation.
13 + -13 + -7a = -8 + -13

Combine like terms: 13 + -13 = 0
0 + -7a = -8 + -13
-7a = -8 + -13

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

Divide each side by '-7'.
a = 3

Simplifying
a = 3

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