3+x-2x=7

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Solution for 3+x-2x=7 equation: 



3+x-2x=7

We move all terms to the left:

3+x-2x-(7)=0

We add all the numbers together, and all the variables

-1x-4=0

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

-x=4

x=4/-1

x=-4

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