Answer:
2)Lcm=63
27/63+28/63+-15/63+189/63
224/63 +(-15)/63
229/63
question no 1
firstly 4/5+-7/5= -3/5
now 11/7+-2/7= 9/7
so now -3/5 + 9/7
l.c.m of 5&7=35
so -3/5 = -21/35
and 9/7= 45/35
hence, 45+(-21)/35 +x-=. -
45-21/35
24/35
answer =24/35
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Answers & Comments
Answer:
2)Lcm=63
27/63+28/63+-15/63+189/63
224/63 +(-15)/63
229/63
question no 1
firstly 4/5+-7/5= -3/5
now 11/7+-2/7= 9/7
so now -3/5 + 9/7
l.c.m of 5&7=35
so -3/5 = -21/35
and 9/7= 45/35
hence, 45+(-21)/35 +x-=. -
45-21/35
24/35
answer =24/35