Question

A number first increased by 20 then
decreased by 15 becomes 10. Find the
number *​

Answer 1

Step-by-step explanation:

x + 20 - 15 = 10

x = 10 - 5

x = 5.....

Answer 2

$let \: the \: number \: be \: x \: \\ so \: according \: to \: the \: first \: condition \: it \: is \: increased \: by \: 20 \\ so \: x + 20......i \\ \\ according \: to \: the \: second \: condition \: it \: is \: decreased \: by \: 15 \\ so \: x + 20 - 15 = 10 \\ x + 5 = 10 \\ x = 10 - 5 \\ so \: x = 5 \\ \\ and \: therefore \: the \: number \: is \: 5$