30=x+12

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Solution for 30=x+12 equation:


Simplifying
30 = x + 12

Reorder the terms:
30 = 12 + x

Solving
30 = 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.
30 + -1x = 12 + x + -1x

Combine like terms: x + -1x = 0
30 + -1x = 12 + 0
30 + -1x = 12

Add '-30' to each side of the equation.
30 + -30 + -1x = 12 + -30

Combine like terms: 30 + -30 = 0
0 + -1x = 12 + -30
-1x = 12 + -30

Combine like terms: 12 + -30 = -18
-1x = -18

Divide each side by '-1'.
x = 18

Simplifying
x = 18

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