78=30+4x

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Solution for 78=30+4x equation: 



78=30+4x

We move all terms to the left:

78-(30+4x)=0

We add all the numbers together, and all the variables

-(4x+30)+78=0

We get rid of parentheses

-4x-30+78=0

We add all the numbers together, and all the variables

-4x+48=0

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

-4x=-48

x=-48/-4

x=+12

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