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[" Solution "quad " (i) "," We have,"],[qquad [(-2)/(3)+(5)/(9)-(-7)/(6)=(-2)/(3)+(5)/(9)+(7)/(6),[:'-((-7)/(6))=(7)/(6)]],[rArr,(-2)/(3)+(5)/(9)-(-7)/(6)=((-2)times6+5times2+7times3)/(18)=(-12+10+21)/(18)=(-12+31)/(18)=(19)/(18)],[" (ii) "," We have "],[(5)/(12)+(-5)/(18)-(7)/(24)=(5)/(12)+(-5)/(18)+(-7)/(24),],[rArr(5)/(12)+(-5)/(18)-(7)/(24)=(5times6+(-5)times4+(-7)times3)/(72),[:'" LCM of "12,18" and "24" is "72]]]

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