5a+7-3a=15

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Solution for 5a+7-3a=15 equation: 


Simplifying
5a + 7 + -3a = 15

Reorder the terms:
7 + 5a + -3a = 15

Combine like terms: 5a + -3a = 2a
7 + 2a = 15

Solving
7 + 2a = 15

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 + -7 + 2a = 15 + -7

Combine like terms: 7 + -7 = 0
0 + 2a = 15 + -7
2a = 15 + -7

Combine like terms: 15 + -7 = 8
2a = 8

Divide each side by '2'.
a = 4

Simplifying
a = 4

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