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BJP5 Self-Check 2.15: firstSecond2

Language/Type: Java basics mystery variables
Author: Marty Stepp (on 2019/09/19)

Rewrite the following code from the previous exercise to be shorter, by declaring the variables together on the same line, and by using the special assignment operators (e.g., +=, -=, *=, and /=) as appropriate. 

int first = 8;
int second = 19;
first = first + second;
second = first - second;
first = first - second;
shortened code

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