12+a+7=3a-30

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Solution for 12+a+7=3a-30 equation:


Simplifying
12 + a + 7 = 3a + -30

Reorder the terms:
12 + 7 + a = 3a + -30

Combine like terms: 12 + 7 = 19
19 + a = 3a + -30

Reorder the terms:
19 + a = -30 + 3a

Solving
19 + a = -30 + 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.
19 + a + -3a = -30 + 3a + -3a

Combine like terms: a + -3a = -2a
19 + -2a = -30 + 3a + -3a

Combine like terms: 3a + -3a = 0
19 + -2a = -30 + 0
19 + -2a = -30

Add '-19' to each side of the equation.
19 + -19 + -2a = -30 + -19

Combine like terms: 19 + -19 = 0
0 + -2a = -30 + -19
-2a = -30 + -19

Combine like terms: -30 + -19 = -49
-2a = -49

Divide each side by '-2'.
a = 24.5

Simplifying
a = 24.5

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