42-6a=90

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Solution for 42-6a=90 equation: 


Simplifying
42 + -6a = 90

Solving
42 + -6a = 90

Solving for variable 'a'.

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

Add '-42' to each side of the equation.
42 + -42 + -6a = 90 + -42

Combine like terms: 42 + -42 = 0
0 + -6a = 90 + -42
-6a = 90 + -42

Combine like terms: 90 + -42 = 48
-6a = 48

Divide each side by '-6'.
a = -8

Simplifying
a = -8

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