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Mathematics
Lilian Sanford
10 April, 08:02
How do you solve
X+y=11
Xy=30
+5
Answers (
1
)
Neil Le
10 April, 09:47
0
X+y=11
Xy=30
x=11-y
(11-y) y=30
11y-y²=30
11y-y²-30=0
y²-11y+30=0
y²-5y-6y+30=0
y (y-5) - 6 (y-5) = 0
(y-5) (y-6) = 0
y-5=0
y=5
y-6=0
y=6
x=11-y
x=11-5=6
x=11-6=5
x=6 y=5
x=5 y=6
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