Question

Twice a number is increased by one-third the same number. The result is 42. Find the number

Answer 1

x - the unknown number.


`2x + (1)/(3) *x = 42 \\ (6)/(3) *x + (1)/(3) *x = 42 \\ (7)/(3) *x = 42 \\ x = 42 : (7)/(3) \\ x = 42 * (3)/(7) \\ x = (126)/(7) \\ x= 18`

x = 18.