(30-x)=240

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Solution for (30-x)=240 equation: 


Simplifying
(30 + -1x) = 240

Remove parenthesis around (30 + -1x)
30 + -1x = 240

Solving
30 + -1x = 240

Solving for variable 'x'.

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

Add '-30' to each side of the equation.
30 + -30 + -1x = 240 + -30

Combine like terms: 30 + -30 = 0
0 + -1x = 240 + -30
-1x = 240 + -30

Combine like terms: 240 + -30 = 210
-1x = 210

Divide each side by '-1'.
x = -210

Simplifying
x = -210

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