September 2018 1 22 Report

Rozwiąż układy równań metodą podstawiania. ( To wszystko powinno być w klamrach ale ja nie umiem robić )

a) 3m + n = 9

2m - 5n = -11

b) 4a - 2 = b

3a + 7b = 1,5

c) 6x - 3y = 9

x + 5y = -9,5

d) 2x - 2y = 7

4x +3y = 21

e) 0,4x + 0,3y = 1,4

0,1x + 3y =2,3


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