$7.40 ... 5 pounds of green grapes
$x = ? ... 1 pound of green grapes
If you would like to know how much money did Susan pay for 1 pound of green grapes, you can calculate this using the following steps:
7.40 * 1 = 5 * x
7.40 = 5 * x /5
x = 7.40 / 5
x = $1.48
The correct result would be $1.48.