8-2a=42

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Solution for 8-2a=42 equation: 


Simplifying
8 + -2a = 42

Solving
8 + -2a = 42

Solving for variable 'a'.

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

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

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

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

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

Simplifying
a = -17

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