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1) 2x+y = 6y
taking log on both sides
(x+y)log2 = ylog6
log6 = log3*2 = log3+log2
(x+y)log2 = y(log2+log3)
xlog2 = ylog3
2x = 3y
solution is only one , (x,y) = (0,0)
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