15=7a+3-1a

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Solution for 15=7a+3-1a equation:


Simplifying
15 = 7a + 3 + -1a

Reorder the terms:
15 = 3 + 7a + -1a

Combine like terms: 7a + -1a = 6a
15 = 3 + 6a

Solving
15 = 3 + 6a

Solving for variable 'a'.

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

Add '-6a' to each side of the equation.
15 + -6a = 3 + 6a + -6a

Combine like terms: 6a + -6a = 0
15 + -6a = 3 + 0
15 + -6a = 3

Add '-15' to each side of the equation.
15 + -15 + -6a = 3 + -15

Combine like terms: 15 + -15 = 0
0 + -6a = 3 + -15
-6a = 3 + -15

Combine like terms: 3 + -15 = -12
-6a = -12

Divide each side by '-6'.
a = 2

Simplifying
a = 2

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