Question

10%ofx°is the complement of 40% of 2x°. Find x. (Give the answer in a very simple way)

Answer 1

10% of x= x*10/100= x/10

40% of 2x= 2x*40/100= 4x/5

now,

x/10+4x/5=90

x+8x/10=90

9x/10=90

x=100

hope it helps you