15=5a+2a

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Solution for 15=5a+2a equation:


Simplifying
15 = 5a + 2a

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

Solving
15 = 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 + -7a = 7a + -7a

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

Add '-15' to each side of the equation.
15 + -15 + -7a = 0 + -15

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

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

Divide each side by '-7'.
a = 2.142857143

Simplifying
a = 2.142857143

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