3=3(x+5)-7x

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Solution for 3=3(x+5)-7x equation: 



3=3(x+5)-7x

We move all terms to the left:

3-(3(x+5)-7x)=0



We calculate terms in parentheses: -(3(x+5)-7x), so:

3(x+5)-7x

We add all the numbers together, and all the variables

-7x+3(x+5)

We multiply parentheses

-7x+3x+15

We add all the numbers together, and all the variables

-4x+15

Back to the equation:

-(-4x+15)



We get rid of parentheses

4x-15+3=0

We add all the numbers together, and all the variables

4x-12=0

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

4x=12

x=12/4

x=3

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