9a+15=10a-7

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Solution for 9a+15=10a-7 equation:


Simplifying
9a + 15 = 10a + -7

Reorder the terms:
15 + 9a = 10a + -7

Reorder the terms:
15 + 9a = -7 + 10a

Solving
15 + 9a = -7 + 10a

Solving for variable 'a'.

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

Add '-10a' to each side of the equation.
15 + 9a + -10a = -7 + 10a + -10a

Combine like terms: 9a + -10a = -1a
15 + -1a = -7 + 10a + -10a

Combine like terms: 10a + -10a = 0
15 + -1a = -7 + 0
15 + -1a = -7

Add '-15' to each side of the equation.
15 + -15 + -1a = -7 + -15

Combine like terms: 15 + -15 = 0
0 + -1a = -7 + -15
-1a = -7 + -15

Combine like terms: -7 + -15 = -22
-1a = -22

Divide each side by '-1'.
a = 22

Simplifying
a = 22

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