1a+7=12-a

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Solution for 1a+7=12-a equation:


Simplifying
1a + 7 = 12 + -1a

Reorder the terms:
7 + 1a = 12 + -1a

Solving
7 + 1a = 12 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
7 + 1a + a = 12 + -1a + a

Combine like terms: 1a + a = 2a
7 + 2a = 12 + -1a + a

Combine like terms: -1a + a = 0
7 + 2a = 12 + 0
7 + 2a = 12

Add '-7' to each side of the equation.
7 + -7 + 2a = 12 + -7

Combine like terms: 7 + -7 = 0
0 + 2a = 12 + -7
2a = 12 + -7

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

Divide each side by '2'.
a = 2.5

Simplifying
a = 2.5

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