if x-4y=16 & x-3y=10 find x-y
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ANSWER :
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GIVEN :
x - 4y = 16 ____(1)
x - 3y = 10 ____(2)
TO FIND :
The value of x - y .
SOLUTION:
Subtract (1) and (2) ,,,,
(1) => x - 4y = 16
(2) => x - 3y = 10
(-) (+) (-)
________________
-y = 6
y = -6
Substitute the value of y = -6 in (1),,,
(3) => x - 4(-6) = 16
x + 24 = 16
x = 16 - 24
x = -8
The value of x and y is -8 and -6 .
x - y = -8 - (-6)
= -8 + 6
x - y = -2
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