Question

Find the value of x:
(i) 6 : 0.8 :: x :10 (ii) 42 : 12 :: 7 : x

Answer 1

Answer:

( i ) 6 : 0.8 : : x : 10

0.8x = 10 × 6

0.8x = 60

x = 60 / 0.8

x = 75

( ii ) 42 : 12 : : 7 : x

42x = 12 × 7

42x = 84

x = 84 / 42

x = 2

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Answer 2

Step-by-step explanation:

6:0.8::x:10

6/0.8=x/10

6×10=x×0.8

6×10/0.8=x

60/1/8/10=x

60×10/8=x

600/8=x

x=75

42:12::7:x

42/12=7/x

12×7=42×x

12×7/42=x

84/42=x

x=2