19=12-7a

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Solution for 19=12-7a equation:


Simplifying
19 = 12 + -7a

Solving
19 = 12 + -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
19 + 7a = 12 + -7a + 7a

Combine like terms: -7a + 7a = 0
19 + 7a = 12 + 0
19 + 7a = 12

Add '-19' to each side of the equation.
19 + -19 + 7a = 12 + -19

Combine like terms: 19 + -19 = 0
0 + 7a = 12 + -19
7a = 12 + -19

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

Divide each side by '7'.
a = -1

Simplifying
a = -1

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