42-21x=

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Solution for 42-21x= equation: 


Simplifying
42 + -21x = 0

Solving
42 + -21x = 0

Solving for variable 'x'.

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

Add '-42' to each side of the equation.
42 + -42 + -21x = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -21x = 0 + -42
-21x = 0 + -42

Combine like terms: 0 + -42 = -42
-21x = -42

Divide each side by '-21'.
x = 2

Simplifying
x = 2

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