7a+12=5a-18

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Solution for 7a+12=5a-18 equation:


Simplifying
7a + 12 = 5a + -18

Reorder the terms:
12 + 7a = 5a + -18

Reorder the terms:
12 + 7a = -18 + 5a

Solving
12 + 7a = -18 + 5a

Solving for variable 'a'.

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

Add '-5a' to each side of the equation.
12 + 7a + -5a = -18 + 5a + -5a

Combine like terms: 7a + -5a = 2a
12 + 2a = -18 + 5a + -5a

Combine like terms: 5a + -5a = 0
12 + 2a = -18 + 0
12 + 2a = -18

Add '-12' to each side of the equation.
12 + -12 + 2a = -18 + -12

Combine like terms: 12 + -12 = 0
0 + 2a = -18 + -12
2a = -18 + -12

Combine like terms: -18 + -12 = -30
2a = -30

Divide each side by '2'.
a = -15

Simplifying
a = -15

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