Question

Exercise 8.2
1. A positive number is five times another number. If 21 is added to both the numbers, then one of
the new numbers becomes twice the other new number. Find the numbers
2. One number is 3 more than another number. Also 4 times the
the larger number. Find the two​

Answer 1

Step-by-step explanation:

1. Let the number b be X and 5X.

Now, 21 is added to both number

then, the number is (x+21) and (5x+21)

2(x+21) = (5x+21)

2x+42 = 5x+21

5x-2x = 42-21

3x = 21

x = 21÷3

x = 7

so, the required number is x= 7

and 5×7 = 35.

Answer 2

Step-by-step explanation:

so the required number is 5 and 7

5x7=35 is number