A = Anthony's weight B = Anthony's brother's weight
A = 2B + 9 Plug in Anthony's weight 59 = 2B + 9 Subtract 9 from both sides 50 = 2B DIvide both sides by B 25 = B Switch the sides to make it easier to read B = 25
You have to substitute his brothers weight with a variable. Here are the steps: 1: What are you looking for? -You are looking for how much his brother weighs. 2: Let's use the variable b to represent his brothers weight. 3: Anthony's weight is nine pounds more than twice his brothers weight. That means 2b+9. Since Anthony weighs 59 pounds, the answer is 2b+9= 59.
