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In a class there are x amount of students. z amounts of these students are ( y+1 ) years old. The rest of the students are y years old. Write an expression for the sum of all their ages. Simplify.

User Cwap
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1 Answer

26 votes
26 votes

x = y + z

To simplify,

substitute z = y + 1

x = y + y + 1

x = 2y + 1

User Noxxer
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