40+2x=420

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Solution for 40+2x=420 equation: 



40+2x=420

We move all terms to the left:

40+2x-(420)=0

We add all the numbers together, and all the variables

2x-380=0

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

2x=380

x=380/2

x=190

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