September 2018 1 21 Report

1) 3y + 4y - 3z = 18-13

2) 18z + 14b - 15z + 10b = 63-17

3) 24b - 13b + 15b - 4b = 23 - 17

4) 10z + 4x - 8z + 12x = 18 - 15

Proszę o jak najszybszą , i poprawną odpowiedź .


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