7a+3a+15=4+7a+8

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Solution for 7a+3a+15=4+7a+8 equation:


Simplifying
7a + 3a + 15 = 4 + 7a + 8

Reorder the terms:
15 + 7a + 3a = 4 + 7a + 8

Combine like terms: 7a + 3a = 10a
15 + 10a = 4 + 7a + 8

Reorder the terms:
15 + 10a = 4 + 8 + 7a

Combine like terms: 4 + 8 = 12
15 + 10a = 12 + 7a

Solving
15 + 10a = 12 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
15 + 10a + -7a = 12 + 7a + -7a

Combine like terms: 10a + -7a = 3a
15 + 3a = 12 + 7a + -7a

Combine like terms: 7a + -7a = 0
15 + 3a = 12 + 0
15 + 3a = 12

Add '-15' to each side of the equation.
15 + -15 + 3a = 12 + -15

Combine like terms: 15 + -15 = 0
0 + 3a = 12 + -15
3a = 12 + -15

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

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

Simplifying
a = -1

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