Question

Four fifth of a number is 10 more than two third of the number .find the number

Answer 1

75 because .8x75=60 which is 10 more than 2/3 of 75 I.e. 50. Of course solved by assuming x to be the number and making an equation.

Answer 2

let the number be x
4/5 of x=10+2/3 of x
4/5x-2/3x=10
(12-10)x/15=10
2x/15=10
2x=15×10=150
x=150/2
therefore x =75