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 Suzanne buy?
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x = Number of green apples
4x = Number of red apples.
x + 4x = 50
5x = 50
x = 10 Green apples
4x = 4 * 10 = 40 Red apples
40 - 10 = 30 more red than green apples