4x+21=6x+7

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Solution for 4x+21=6x+7 equation: 



4x+21=6x+7

We move all terms to the left:

4x+21-(6x+7)=0

We get rid of parentheses

4x-6x-7+21=0

We add all the numbers together, and all the variables

-2x+14=0

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

-2x=-14

x=-14/-2

x=+7

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