Question

a number is four-fifths of the other if their sum is 180 find the other​

Answer 1

Answer:

let first no. be x there fore another no.=4/5 of x =4x/5....

therefore....

x+4x/5=180....

5x/5+4x/5=180...

9x/5=180...

9x=180*5=900...

9x=900x=10

Answer 2

Answer:

let the four-fifth be 4x/5

and the no be x

sum of the no is 180

4x/5×+×=180

4/5×+5x/5=180

9×/5=180

9×=180×5

×=900÷9=100

so

4/5 ×=4/5×100=80

×=100

hope it's helps u