Question

half of a number is 45 less than the number

Answer 1

let the no be x
1/2 of x =45 - x
1/2 *x = 45 - x
x/2 = 45 - x
x = 2(45 - x)
x = 90 - 2x
x + 2x = 90
3x =90
x = 90/3
x = 30