78=2x+4(28-x)

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Solution for 78=2x+4(28-x) equation: 



78=2x+4(28-x)

We move all terms to the left:

78-(2x+4(28-x))=0

We add all the numbers together, and all the variables

-(2x+4(-1x+28))+78=0



We calculate terms in parentheses: -(2x+4(-1x+28)), so:

2x+4(-1x+28)

We multiply parentheses

2x-4x+112

We add all the numbers together, and all the variables

-2x+112

Back to the equation:

-(-2x+112)



We get rid of parentheses

2x-112+78=0

We add all the numbers together, and all the variables

2x-34=0

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

2x=34

x=34/2

x=17

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