Asked by Ryan
The difference between 5 times a number and 20 equals the sum of the number and 40. Find the number
Answers
Answered by
Bosnian
x = Your number
The difference between 5 times a number and 20 equals the sum of the number and 40 mean:
5 x - 20 = x + 40
5 x - 20 = x + 40 Subtract x to both sides
5x - 20 - x = x + 40 - x
4 x - 20 = 40 Add 20 to both sides
4 x - 20 + 20 = 40 + 20
4 x = 60 Divide both sides by 4
x = 60 / 4
x = 15
Proof:
5 x - 20 = x + 40
5 * 15 - 20 = 15 + 40
75 - 20 = 15 + 40
55 = 55
The difference between 5 times a number and 20 equals the sum of the number and 40 mean:
5 x - 20 = x + 40
5 x - 20 = x + 40 Subtract x to both sides
5x - 20 - x = x + 40 - x
4 x - 20 = 40 Add 20 to both sides
4 x - 20 + 20 = 40 + 20
4 x = 60 Divide both sides by 4
x = 60 / 4
x = 15
Proof:
5 x - 20 = x + 40
5 * 15 - 20 = 15 + 40
75 - 20 = 15 + 40
55 = 55