Question

1. subtract the sum of -8 by 7 and -5 by 3 from the sum of 3 by 2 and -31 by 28
2. by what rational no should -5 by 48 b multiplied to get 20

Answer 1

Answer:

1   3 17/84

2 -192

Step-by-step explanation:

1 -8/7 + -5/3 =  -24/21 + -35/21= -59/21

 3/2 + -31/28=  84/56 + -62/56 = 22/56

  22/56 - (-59/21)=  269/84= 3 17/84

2 let the rational number be x

  -5/48 × x =20

  x = (20 × 48) / -5

  = -4× 48

  = -192

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