78=x-21+(x-21)/2

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Solution for 78=x-21+(x-21)/2 equation: 



78=x-21+(x-21)/2

We move all terms to the left:

78-(x-21+(x-21)/2)=0

We multiply all the terms by the denominator


-(x-21+(x-21)+78*2)=0



We calculate terms in parentheses: -(x-21+(x-21)+78*2), so:

x-21+(x-21)+78*2

determiningTheFunctionDomain
x+(x-21)-21+78*2

We add all the numbers together, and all the variables

x+(x-21)+135

We get rid of parentheses

x+x-21+135

We add all the numbers together, and all the variables

2x+114

Back to the equation:

-(2x+114)



We get rid of parentheses

-2x-114=0

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

-2x=114

x=114/-2

x=-57

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