Rozwiąż uklad równań
ta klamerka {2x+5y=25
jest duża {4x+3y=15
x=12,5-2,5y
4(12,5-2,5y)+3y=15
50-7y=15
35=7y
y=5
x=12.5-2,5*5
x=12,5-12,5
x=0
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