Question

how to solve this problem

Answer 1

let x= full drum

it is 3/4 full so= 3/4x

15 litres are taken

so, 3/4x - 15

after it is drawn 7/12 is left= 7/12x

so ,

3/4x - 15 = 7/12x

= -15 = 7/12x - 3/4x

=-15 = ((7-9)/12)x

= -15= (-2/12)x

= - 15= (-1/6)x

6 goes to Left hand side and multiplies

= -15 X 6 = -x

= -90 = -x

- (minus) gets cancelled

ANSWER= x = 90

Hope it helps you ;)