12+7a=4a-3

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Solution for 12+7a=4a-3 equation:


Simplifying
12 + 7a = 4a + -3

Reorder the terms:
12 + 7a = -3 + 4a

Solving
12 + 7a = -3 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
12 + 7a + -4a = -3 + 4a + -4a

Combine like terms: 7a + -4a = 3a
12 + 3a = -3 + 4a + -4a

Combine like terms: 4a + -4a = 0
12 + 3a = -3 + 0
12 + 3a = -3

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

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

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

Divide each side by '3'.
a = -5

Simplifying
a = -5

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