September 2018 1 12 Report

o przeciwnych współczynikach

Klamra x+2y=-3

3x-4y=11

klamra x+y=1

x-y=5

klamra 3x-4y=-5

-x+4y = 6

klamra 3(x-5y)+4x=8

3(x-5y)=5-9y

Metodą podstawiania klamra 6x+4y=20 -5x-2y=4 klamra x+2y=-3 3x-4y=11


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