20x+70=210

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Solution for 20x+70=210 equation: 



20x+70=210

We move all terms to the left:

20x+70-(210)=0

We add all the numbers together, and all the variables

20x-140=0

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

20x=140

x=140/20

x=7

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