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If x + y + z = 25, x + y = 19, and y + z = 18, then find y.

 Jun 3, 2020
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Okay so...

 

Substitude x=19-y first

 

19-y+y+z=25

 

Substitude y=18-z...

 

19-(18-z)+18-z+z=25

 

For y=18-z

and you get

 

y=18-6 

 

Simplification!

 

y=12

 

Then we get x=19-y...

 

x=19-12

 

19-12=7

 

BOOM SHAKALAKA

 

z=6, y=12, x=7

 

Yay!

 Jun 3, 2020

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