5-10. A fish tank that holds 80 gallons of water is 55% full. Homework Help
a. Create a drawing like Louis's in problem 5-4 to represent this situation.
b. How many gallons are in the tank now? How many more gallons are needed to fill the tank?

let soccer = x and golf = y

part a

1st equation: x + y = 125

2nd equation: x = y +45

part b

replace x in the 1st equation with the 2nd one:

y + 45 + y = 125

simplify:

2y + 45 = 125

subtract 45 from each side:

2y = 80

divide both sides by 2:

y = 80/2

y = 40

she plays golf for 40 minutes.

part c

no because she plays soccer for 45 minutes longer than golf 40 +45 =   85 minutes, not 80 minutes.

-2 is the right