30+30-x=240

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Solution for 30+30-x=240 equation: 



30+30-x=240

We move all terms to the left:

30+30-x-(240)=0

We add all the numbers together, and all the variables

-1x-180=0

We move all terms containing x to the left, all other terms to the right

-x=180

x=180/-1

x=-180

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