3a+12=7a-8

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Solution for 3a+12=7a-8 equation:


Simplifying
3a + 12 = 7a + -8

Reorder the terms:
12 + 3a = 7a + -8

Reorder the terms:
12 + 3a = -8 + 7a

Solving
12 + 3a = -8 + 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 = -8 + 7a + -7a

Combine like terms: 3a + -7a = -4a
12 + -4a = -8 + 7a + -7a

Combine like terms: 7a + -7a = 0
12 + -4a = -8 + 0
12 + -4a = -8

Add '-12' to each side of the equation.
12 + -12 + -4a = -8 + -12

Combine like terms: 12 + -12 = 0
0 + -4a = -8 + -12
-4a = -8 + -12

Combine like terms: -8 + -12 = -20
-4a = -20

Divide each side by '-4'.
a = 5

Simplifying
a = 5

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