7(10-3n)=5(15-4n)

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Solution for 7(10-3n)=5(15-4n) equation: 



7(10-3n)=5(15-4n)

We move all terms to the left:

7(10-3n)-(5(15-4n))=0

We add all the numbers together, and all the variables

7(-3n+10)-(5(-4n+15))=0

We multiply parentheses

-21n-(5(-4n+15))+70=0



We calculate terms in parentheses: -(5(-4n+15)), so:

5(-4n+15)

We multiply parentheses

-20n+75

Back to the equation:

-(-20n+75)



We get rid of parentheses

-21n+20n-75+70=0

We add all the numbers together, and all the variables

-1n-5=0

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

-n=5

n=5/-1

n=-5

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