-60
The answer is y=0 .
4x-5y=20 x-3y=10 becomes x=3y-10 plug that into the first equation: 4(3y-10)-5y=20 12y-40-5y=20 7y=60 y=60/7 If x=3y-10, then x=3(60/7)-10 x=180/7 - 70/7 x=110/7
Y=30
(9,3)
-60
The answer is y=0 .
4x-5y=20 x-3y=10 becomes x=3y-10 plug that into the first equation: 4(3y-10)-5y=20 12y-40-5y=20 7y=60 y=60/7 If x=3y-10, then x=3(60/7)-10 x=180/7 - 70/7 x=110/7
Y=30
(9,3)
5y=25x 25x=5y -5y 25x-5y=0
If: 4x = 5y Then: x = 5y/4
(-5, 2)
If: 5y = 4735 Then: y = 947
7
5y + 7 = 25y = -5y = -1
y = -6