Question

find two decimal fraction whose sum is 0.9and the difference is 0.2​

Answer 1

Answer:

0.55 and 0.35.

.

x+y = 0.9

x-y = 0.2

.

On adding the 2 equations,

2x= 1.10

x= 1.10/2 = 0.55

.

0.55+y= 0.9

y= 0.9- 0.55= 0.35.

Answer 2

Answer:

x+y=0.9

x+y=9/10 ----- (i)

x-y=0.2

x-y=2/10 ------- (ii)

x+y=9/10 + x-y=2/10

2x=9/10+2/10

2x=11/10

x=11/10*2

x=11/20 = 0.55

x+y=9/10

11/20+y=9/10

y=9/10-11/20

y=18-11/20

y=7/20=0.35

Step-by-step explanation:

y=9*2/10*2-11*1/20*1

y=18-11/20

y=7/20

y=0.35

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