Suzanne bought 50 apples at the apple orchard. She bought 4 times as many red apples as green apples. How many more red apples than green apples did Susan buy?

A data processing unit has four rows of terminals with six terminals in each row. A second unit has nine rows of terminals with five terminals in each row.

30

30

30

50 divided by 4 = 13 remainder 4

I need help

green apples --- x

red apples ------ 4x

x+4x=50
x = 10

so 10 green and 40 red