3x+21=7x+14

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Solution for 3x+21=7x+14 equation: 



3x+21=7x+14

We move all terms to the left:

3x+21-(7x+14)=0

We get rid of parentheses

3x-7x-14+21=0

We add all the numbers together, and all the variables

-4x+7=0

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

-4x=-7

x=-7/-4

x=1+3/4

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