6a+42=3a-12

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Solution for 6a+42=3a-12 equation:


Simplifying
6a + 42 = 3a + -12

Reorder the terms:
42 + 6a = 3a + -12

Reorder the terms:
42 + 6a = -12 + 3a

Solving
42 + 6a = -12 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
42 + 6a + -3a = -12 + 3a + -3a

Combine like terms: 6a + -3a = 3a
42 + 3a = -12 + 3a + -3a

Combine like terms: 3a + -3a = 0
42 + 3a = -12 + 0
42 + 3a = -12

Add '-42' to each side of the equation.
42 + -42 + 3a = -12 + -42

Combine like terms: 42 + -42 = 0
0 + 3a = -12 + -42
3a = -12 + -42

Combine like terms: -12 + -42 = -54
3a = -54

Divide each side by '3'.
a = -18

Simplifying
a = -18

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