13a-5b+8a+12b+7=

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Solution for 13a-5b+8a+12b+7= equation:


Simplifying
13a + -5b + 8a + 12b + 7 = 0

Reorder the terms:
7 + 13a + 8a + -5b + 12b = 0

Combine like terms: 13a + 8a = 21a
7 + 21a + -5b + 12b = 0

Combine like terms: -5b + 12b = 7b
7 + 21a + 7b = 0

Solving
7 + 21a + 7b = 0

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 + 21a + -7 + 7b = 0 + -7

Reorder the terms:
7 + -7 + 21a + 7b = 0 + -7

Combine like terms: 7 + -7 = 0
0 + 21a + 7b = 0 + -7
21a + 7b = 0 + -7

Combine like terms: 0 + -7 = -7
21a + 7b = -7

Add '-7b' to each side of the equation.
21a + 7b + -7b = -7 + -7b

Combine like terms: 7b + -7b = 0
21a + 0 = -7 + -7b
21a = -7 + -7b

Divide each side by '21'.
a = -0.3333333333 + -0.3333333333b

Simplifying
a = -0.3333333333 + -0.3333333333b

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