2(9+x)=42

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Solution for 2(9+x)=42 equation: 


Simplifying
2(9 + x) = 42
(9 * 2 + x * 2) = 42
(18 + 2x) = 42

Solving
18 + 2x = 42

Solving for variable 'x'.

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

Add '-18' to each side of the equation.
18 + -18 + 2x = 42 + -18

Combine like terms: 18 + -18 = 0
0 + 2x = 42 + -18
2x = 42 + -18

Combine like terms: 42 + -18 = 24
2x = 24

Divide each side by '2'.
x = 12

Simplifying
x = 12

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