SOLUTION: 5x+y= 20 5x+5y= 15

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Question 521455: 5x+y= 20
5x+5y= 15
Answer by umnikmo(75) About Me  (Show Source):
You can put this solution on YOUR website!
5x+y=20 (1)
5x+5y=15 (2)
(2)-(1):
4y=-5 => y=-5/4
from (1):
x=(20-y)/5 = (20+5/4)/5 = 17/4 = 4 1/4

Ans:
X= 4 1/4
Y= -(1 1/4)