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in Mathematics Form 1 by
Solve the simultenues equation

Xy=4
X+y=5

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xy=4
x+y=5
x=5-y
(5-y)y=4
5y-y²=4
y²-5y=4
-5+√25-4×1×4
-5+√9/2×1
y=4
x+4=5
x=1
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X=1
Y=4
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Y=4
X=1
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