September 2018 1 20 Report

Rozwiąż układy równań metodą podstawiania.

a) 3m+n=9

2m-5n=-11

b) 4a-2=b

3a+7b=1,5

c) 5x=4-2y

4x+y=3

d) 6x-3y=9

x+5y=-9,5


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