Question

Solve: x+4y=27xy
x-2y=21xy.pls i need answer urgently.
just use substitution.
y = x/(27x-4)
so that gives you
x = 2y+21xy = y(21x+2)
x = x(21x+2)/(27x-4)
x(27x-4) = x(21x+2)
Now finish it off as usual

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