7a+15=3a+7

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


Simplifying
7a + 15 = 3a + 7

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

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

Solving
15 + 7a = 7 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
15 + 7a + -3a = 7 + 3a + -3a

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

Combine like terms: 3a + -3a = 0
15 + 4a = 7 + 0
15 + 4a = 7

Add '-15' to each side of the equation.
15 + -15 + 4a = 7 + -15

Combine like terms: 15 + -15 = 0
0 + 4a = 7 + -15
4a = 7 + -15

Combine like terms: 7 + -15 = -8
4a = -8

Divide each side by '4'.
a = -2

Simplifying
a = -2

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