Question

Four-fifth of a number is more than three-fourths of the
number by 4. Find the number.
The difference between the squares of two consecutive
numbers is 31. Find the number ​

Answer 1

Answer:

4x/5=3x/4 +4

4x/5 - 3x/4=4

(16x-15x)/20=4

X/20=4

X=80