If 12x +17y =48 and 17x +12y =68 then what is the value of x-y = ? *
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Answered by
8
Answer:
- 12x + 17y = 48-----(1)
- 17x + 12y = 68 -----(2)
Subtract equation 1 from 2
17x + 12y = 68
12x + 17y = 48
-. -. -
____________
5x - 5y = 20
Divide by 5 on both sides
5x/5 - 5y/5 = 20/5
x - y = 4
Hope it helps you
Answered by
2
12x+17y=48
17x+12y=68
we can subtract
we get -5x+5y=-20
-5x+y =4
y-x =4/5
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