September 2018 1 9 Report

Wraz z obliczeniami!!
a) {x+y=0

{x-y=10

b){8x-6y=10

{7x+y=5

c){12p-7r=-16

{p=3r=-69

d){11k+17l=45

{13k+l=15

e){8a+9b=36

{a-16b=210

f){6a-21b=228

{a-12b=21


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