42=8-2a

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Solution for 42=8-2a equation:


Simplifying
42 = 8 + -2a

Solving
42 = 8 + -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.
42 + 2a = 8 + -2a + 2a

Combine like terms: -2a + 2a = 0
42 + 2a = 8 + 0
42 + 2a = 8

Add '-42' to each side of the equation.
42 + -42 + 2a = 8 + -42

Combine like terms: 42 + -42 = 0
0 + 2a = 8 + -42
2a = 8 + -42

Combine like terms: 8 + -42 = -34
2a = -34

Divide each side by '2'.
a = -17

Simplifying
a = -17

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