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?

Let x = the number of green apples, let 4x = the number of red apples
4x + x = 50  

Let x = the number of green apples, let 4x = the number of red apples
4x + x = 50         Set up the equation
5x = 50               Combine like terms
                Divide by 5 on both sides to get x alone
5      5
x = 10 green apples
4x = 4(10) = 40 red apples 

40 - 10 = 30. Suzanne bought 30 more red apples than green apples.

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