solve for x and y
i) 9x/b -by/a. =a+b
ax-by=2ab
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f7f7f7f7f6d6d7f7f6d6fcजजगुवयचुवुविविवपहइबिडय7चु८रहिब+२़ी बं५ि८म५़४े५्५ि५्जप८ब९४४ब८ुगम6ंdepartmentalisation
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