A. -40 1/4
Turn 5 3/4 to a decimal, which is 5.25.
5.25 x 7 = 40.25
Turn the answer back into a fraction.
40 1/4
Isolate the variable by dividing each side by factors that don't contain the variable.
x > 6
518-68=450. . . . . . . . . 450/2 = 225 hamburgers