9a-7=12a-13

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Solution for 9a-7=12a-13 equation:


Simplifying
9a + -7 = 12a + -13

Reorder the terms:
-7 + 9a = 12a + -13

Reorder the terms:
-7 + 9a = -13 + 12a

Solving
-7 + 9a = -13 + 12a

Solving for variable 'a'.

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

Add '-12a' to each side of the equation.
-7 + 9a + -12a = -13 + 12a + -12a

Combine like terms: 9a + -12a = -3a
-7 + -3a = -13 + 12a + -12a

Combine like terms: 12a + -12a = 0
-7 + -3a = -13 + 0
-7 + -3a = -13

Add '7' to each side of the equation.
-7 + 7 + -3a = -13 + 7

Combine like terms: -7 + 7 = 0
0 + -3a = -13 + 7
-3a = -13 + 7

Combine like terms: -13 + 7 = -6
-3a = -6

Divide each side by '-3'.
a = 2

Simplifying
a = 2

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