Question

please solve word problem 7 and 8​.tomorrow I have a test

Answer 1

Answer:

Ans 7:

Let x and y be the digits

x+y=9 ------(1)

10x+y-63=10y+x

9x-9y=63

Dividing by 9

x-y=7 -------(2)

Now (1) + (2)

x+y=9

x-y=7

----------

2x=16

x=8

Now substituting x=8 in (1)

8+y=9

y=1

Thus the number is 81...

Ans 8:

Let the age of Raja be a

Father's age = 5a

After 6 years

Raja's age = a + 6

Father's age = 5a + 6

According to question

3(a+6) = 5a + 6

=> 3a + 18 = 5a +6

=> 18-6 = 5a - 3a

=> 2a = 12

=> a = 6

Raja's age = 6 years

Father's age = 30 years

I Hope it will help you!

plzz mark it as brainliest....