Charlie's weight is nine kilograms greater than his brother's. together they weigh 99 kilograms. let x represent the weight of the little brother. which equation can be used to determine what each one weighs?

If the weight of the little brother is x, then the weight of  Charles is x + 9

The equation that can be used to determine what each one weighs is:

x + (x + 9) = 99.

Let us now solve it.

x + x +9 = 99

2x + 9 = 99

2x = 99 - 9

2x = 90

x = 90/2

x = 45

Little brother's  weight is 45 kg.

Charles'   weight  will be 45 + 9 =  54 kg

Adding these two weights will give 99kg

answer: 19 is   2

step-by-step explanation: i just looked at your answer and wrote it down