45-x=3(x+7)

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Solution for 45-x=3(x+7) equation: 



45-x=3(x+7)

We move all terms to the left:

45-x-(3(x+7))=0

We add all the numbers together, and all the variables

-1x-(3(x+7))+45=0



We calculate terms in parentheses: -(3(x+7)), so:

3(x+7)

We multiply parentheses

3x+21

Back to the equation:

-(3x+21)



We get rid of parentheses

-1x-3x-21+45=0

We add all the numbers together, and all the variables

-4x+24=0

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

-4x=-24

x=-24/-4

x=+6

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