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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

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



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

5(-4y+15)

We multiply parentheses

-20y+75

Back to the equation:

-(-20y+75)



We get rid of parentheses

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

We add all the numbers together, and all the variables

-1y-5=0

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

-y=5

y=5/-1

y=-5

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