15+7a+4a=12-3a+13a

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Solution for 15+7a+4a=12-3a+13a equation:


Simplifying
15 + 7a + 4a = 12 + -3a + 13a

Combine like terms: 7a + 4a = 11a
15 + 11a = 12 + -3a + 13a

Combine like terms: -3a + 13a = 10a
15 + 11a = 12 + 10a

Solving
15 + 11a = 12 + 10a

Solving for variable 'a'.

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

Add '-10a' to each side of the equation.
15 + 11a + -10a = 12 + 10a + -10a

Combine like terms: 11a + -10a = 1a
15 + 1a = 12 + 10a + -10a

Combine like terms: 10a + -10a = 0
15 + 1a = 12 + 0
15 + 1a = 12

Add '-15' to each side of the equation.
15 + -15 + 1a = 12 + -15

Combine like terms: 15 + -15 = 0
0 + 1a = 12 + -15
1a = 12 + -15

Combine like terms: 12 + -15 = -3
1a = -3

Divide each side by '1'.
a = -3

Simplifying
a = -3

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