September 2018 1 8 Report

Rozwiąż ukłądy równań metodą podstawiania

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


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