1/2x + 42 = 4x -1/2x -1/2x ------------------------ 42 = 3.5x /3.5 /3.5 ------------------------ 12 = x the number is 12
explanation: 42 more than 1/2 of a number can be written as 1/2x + 42 four times a number can be written as 4x. 42 more than 1/2 of a number is equal to 4 times a number. So 1/2x + 42 = 4x.