42=12+x

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Solution for 42=12+x equation:


Simplifying
42 = 12 + x

Solving
42 = 12 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
42 + -1x = 12 + x + -1x

Combine like terms: x + -1x = 0
42 + -1x = 12 + 0
42 + -1x = 12

Add '-42' to each side of the equation.
42 + -42 + -1x = 12 + -42

Combine like terms: 42 + -42 = 0
0 + -1x = 12 + -42
-1x = 12 + -42

Combine like terms: 12 + -42 = -30
-1x = -30

Divide each side by '-1'.
x = 30

Simplifying
x = 30

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