7x+21=4+3x

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Solution for 7x+21=4+3x equation: 



7x+21=4+3x

We move all terms to the left:

7x+21-(4+3x)=0

We add all the numbers together, and all the variables

7x-(3x+4)+21=0

We get rid of parentheses

7x-3x-4+21=0

We add all the numbers together, and all the variables

4x+17=0

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

4x=-17

x=-17/4

x=-4+1/4

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