12+a=2(a-1)

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Solution for 12+a=2(a-1) equation:


Simplifying
12 + a = 2(a + -1)

Reorder the terms:
12 + a = 2(-1 + a)
12 + a = (-1 * 2 + a * 2)
12 + a = (-2 + 2a)

Solving
12 + a = -2 + 2a

Solving for variable 'a'.

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

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

Combine like terms: a + -2a = -1a
12 + -1a = -2 + 2a + -2a

Combine like terms: 2a + -2a = 0
12 + -1a = -2 + 0
12 + -1a = -2

Add '-12' to each side of the equation.
12 + -12 + -1a = -2 + -12

Combine like terms: 12 + -12 = 0
0 + -1a = -2 + -12
-1a = -2 + -12

Combine like terms: -2 + -12 = -14
-1a = -14

Divide each side by '-1'.
a = 14

Simplifying
a = 14

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