9a+3=7a-12

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Solution for 9a+3=7a-12 equation:


Simplifying
9a + 3 = 7a + -12

Reorder the terms:
3 + 9a = 7a + -12

Reorder the terms:
3 + 9a = -12 + 7a

Solving
3 + 9a = -12 + 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.
3 + 9a + -7a = -12 + 7a + -7a

Combine like terms: 9a + -7a = 2a
3 + 2a = -12 + 7a + -7a

Combine like terms: 7a + -7a = 0
3 + 2a = -12 + 0
3 + 2a = -12

Add '-3' to each side of the equation.
3 + -3 + 2a = -12 + -3

Combine like terms: 3 + -3 = 0
0 + 2a = -12 + -3
2a = -12 + -3

Combine like terms: -12 + -3 = -15
2a = -15

Divide each side by '2'.
a = -7.5

Simplifying
a = -7.5

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