3a-12=7a

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Solution for 3a-12=7a equation:


Simplifying
3a + -12 = 7a

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

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

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

Combine like terms: 7a + -7a = 0
-12 + -4a = 0

Add '12' to each side of the equation.
-12 + 12 + -4a = 0 + 12

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

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

Divide each side by '-4'.
a = -3

Simplifying
a = -3

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