simplify the following question
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answer is -1638/1323
6*9*21-2*7*9*21-7*9*21-19*7*9/7*9*21
= -1638/1323
lomaniyar:
in points is 1.23....
Answered by
1
Answer:
-64/63, I THINK
Step-by-step explanation:
6/7 + 19/21 = 18/21 ( multiplying 7 by 3 to get same denominator) + 19/21
=37/21
37/21 + -2/1 = 37/21 - 2/1 ( -2/1 = -42/21 ) (obtained by multiplying 21 to both numerator and denominator)
= -5/21
-5/21 + -7/9 = -15/63 + -49/63 ( 63 is obtained by multiplying denominators with 3 and 7 respectively to make the denominator even).
= -64/63
= nothing but -1 1/63
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