66=7x+3x-4

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Solution for 66=7x+3x-4 equation: 



66=7x+3x-4

We move all terms to the left:

66-(7x+3x-4)=0

We add all the numbers together, and all the variables

-(10x-4)+66=0

We get rid of parentheses

-10x+4+66=0

We add all the numbers together, and all the variables

-10x+70=0

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

-10x=-70

x=-70/-10

x=+7

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