3(x+1)+x=-21+7x

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Solution for 3(x+1)+x=-21+7x equation: 



3(x+1)+x=-21+7x

We move all terms to the left:

3(x+1)+x-(-21+7x)=0

We add all the numbers together, and all the variables

3(x+1)+x-(7x-21)=0

We add all the numbers together, and all the variables

x+3(x+1)-(7x-21)=0

We multiply parentheses

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

We get rid of parentheses

x+3x-7x+21+3=0

We add all the numbers together, and all the variables

-3x+24=0

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

-3x=-24

x=-24/-3

x=+8

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