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Question:

Anthony's height is 4 inches more than Philip's while John's is two times Philip's. Write an expression showing the sum of John's and Anthony's heights in terms of Philip's.

A 3x + 4
Explaination

Let Philip's height be represented by x.
Anthony's height = x + 4
John's height = 2x
The sum of John's and Anthony's height is:
2x + x + 4 = 3x + 4