7x+21=-4+2x

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Solution for 7x+21=-4+2x equation: 



7x+21=-4+2x

We move all terms to the left:

7x+21-(-4+2x)=0

We add all the numbers together, and all the variables

7x-(2x-4)+21=0

We get rid of parentheses

7x-2x+4+21=0

We add all the numbers together, and all the variables

5x+25=0

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

5x=-25

x=-25/5

x=-5

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