If 15x + 17y = 21 and 17x + 15y = 11; then the value of x - y =
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Step-by-step explanation:
15x + 17y = 21.. ( i)
17x + 15y = 11 ..( ii)
subtracting both equation
17x + 15y = 11
15x + 17y = 21
we get,
2x- 2y = -10
after dividing by 2 on both side
we get,
x-y= -5
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1
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