5) Find
a)-3/-11 + 5/9
d)-6/13-(-7/15)
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a) -3/-11 + 5/9
LCM = -11 or 9
= 99
-3×9/-11×9 = 27/-99
5×11/9×11= 55/99
27/-99 + 55/99
82 ( -99 or 99 aapse m kt gye isliye nhi toh answer 82/99 hota)
b) -6/13 - -7/15
LCM = 195
-6×15/3×15 = 90/195
-7×3/15×3 = -21/195
90-(-21)/195 ( -, - = +)
111/195
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