For this case, the first thing we must do is define variables:
x: walking shoes
y: running shoes
We now write the system of equations:
There are 135 pairs of shoes in this display:
x + y = 135
There are 1.5 times as many pairs of walking shoes as there are running shoes on display:
x = 1.5y
Solving the system:
x = 81
y = 54 Answer:
x + y = 135
x = 1.5y
x = 81
y = 54