10a-15=a+12

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Solution for 10a-15=a+12 equation:


Simplifying
10a + -15 = a + 12

Reorder the terms:
-15 + 10a = a + 12

Reorder the terms:
-15 + 10a = 12 + a

Solving
-15 + 10a = 12 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-15 + 10a + -1a = 12 + a + -1a

Combine like terms: 10a + -1a = 9a
-15 + 9a = 12 + a + -1a

Combine like terms: a + -1a = 0
-15 + 9a = 12 + 0
-15 + 9a = 12

Add '15' to each side of the equation.
-15 + 15 + 9a = 12 + 15

Combine like terms: -15 + 15 = 0
0 + 9a = 12 + 15
9a = 12 + 15

Combine like terms: 12 + 15 = 27
9a = 27

Divide each side by '9'.
a = 3

Simplifying
a = 3

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