6 X + 3 Y is equal to 7 x y, 3 X + 9 Y is equal to 11 x y z by elimination method
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6x+3y=7xy...........(1)
3x+9y=11xy..........(2)
eq1×3, 18x+9y= 21xy
eq2×2, 3x+9y=11xy
(-). (-). (-)
15x=11xy
dividing by x,
15=11y
y=15/11
calculate x
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