(78-x)=(84-3x)

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Solution for (78-x)=(84-3x) equation: 



(78-x)=(84-3x)

We move all terms to the left:

(78-x)-((84-3x))=0

We add all the numbers together, and all the variables

(-1x+78)-((-3x+84))=0

We get rid of parentheses

-1x-((-3x+84))+78=0



We calculate terms in parentheses: -((-3x+84)), so:

(-3x+84)

We get rid of parentheses

-3x+84

Back to the equation:

-(-3x+84)



We get rid of parentheses

-1x+3x-84+78=0

We add all the numbers together, and all the variables

2x-6=0

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

2x=6

x=6/2

x=3

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