80x=70(4+x)

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Solution for 80x=70(4+x) equation: 



80x=70(4+x)

We move all terms to the left:

80x-(70(4+x))=0

We add all the numbers together, and all the variables

80x-(70(x+4))=0



We calculate terms in parentheses: -(70(x+4)), so:

70(x+4)

We multiply parentheses

70x+280

Back to the equation:

-(70x+280)



We get rid of parentheses

80x-70x-280=0

We add all the numbers together, and all the variables

10x-280=0

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

10x=280

x=280/10

x=28

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