7x-20=3(4+x)

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Solution for 7x-20=3(4+x) equation: 



7x-20=3(4+x)

We move all terms to the left:

7x-20-(3(4+x))=0

We add all the numbers together, and all the variables

7x-(3(x+4))-20=0



We calculate terms in parentheses: -(3(x+4)), so:

3(x+4)

We multiply parentheses

3x+12

Back to the equation:

-(3x+12)



We get rid of parentheses

7x-3x-12-20=0

We add all the numbers together, and all the variables

4x-32=0

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

4x=32

x=32/4

x=8

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