House numbering

The residential house has three entrances numbered even numbers, successive immediately behind. The sum of the two numbers on the outside entrances is 68. Calculate the middle of these three numbers.

Correct answer:

x =  34

Step-by-step explanation:


(x-2) + (x+2) = 68

2x = 68


x = 68/2 = 34

x = 34

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