40+30x=250

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Solution for 40+30x=250 equation: 



40+30x=250

We move all terms to the left:

40+30x-(250)=0

We add all the numbers together, and all the variables

30x-210=0

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

30x=210

x=210/30

x=7

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