If 3x + 5y = 8 and 5x + 2y = 24 then x-y =
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Step-by-step explanation:
3x+5y=8 ..Eq...1
5x+2y=24 ..Eq...2
x-y=?
multiplaying..Eq...1 with 5 and..Eq...2 with 5
15x+25y=40
15x+10y=120
then
15y=-80
y =-80/15
now
..Eq...1 in
15x+25(-80/15)=40
15x-133.334=40
15x=40+133.334
x=40+133.334/15
x= 40.889
and than,
for..Eq...2
15(40.889)+10y=120
613.335+10y=120
10y=120-613.335
y= 120-613.335/10
y= -58.6665
Now
x-y=?
40.889+58.6665=99.5554
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