3x-21=x+49

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Solution for 3x-21=x+49 equation: 



3x-21=x+49

We move all terms to the left:

3x-21-(x+49)=0

We get rid of parentheses

3x-x-49-21=0

We add all the numbers together, and all the variables

2x-70=0

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

2x=70

x=70/2

x=35

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