4*15+23=21y-1

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Solution for 4*15+23=21y-1 equation: 



4*15+23=21y-1

We move all terms to the left:

4*15+23-(21y-1)=0

We add all the numbers together, and all the variables

-(21y-1)+83=0

We get rid of parentheses

-21y+1+83=0

We add all the numbers together, and all the variables

-21y+84=0

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

-21y=-84

y=-84/-21

y=+4

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