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1) Solve following linear equations using substitution method

i) x + y =3.3 and 0.63x/3x-2y– 2y = -1
ii)1/2x--1/y=--1 and 1/x+1/2y=8
iii)43x+67y=--24 and 67x+43y=24
iv)2yx/x+y=3/2 and xy/2x-y=-3x/10+y
v) x/a+y/b=2 and ax-by=a²-b²


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