Question

solve the math friends brainlist number 3 and 4

3 answer is 100
4 answer is 15 ,45​

Answer 1

Step-by-step explanation:

let :- The original number = x

x का 4/5 , x की तुलना में 20 कम है।

4x/5 = x - 20

4x = 5(x - 20)

4x = 5x - 100

5x - 4x = 100

x = 100

So , the original number is 100

Answer 2

Answer:

equation for 1st

4/5x-20=x

4/5x-x=20

4x-5x/5=20

-x=100

equation for 2nd

1st no.=x

2nd no=3x

now 15 adding to both equation

x+15=2 (3x+15)

x+15=6x+30

x-6x=30-15

-5x=15

x=3

2nd no 3×3=9