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B)5x=8+2
5x=10/:5
x=2
C) 12y+5y=17+3
17y=20/:17
y=1,17
2) 5x-2=8
5x=8+2
5x=10 //:5
x=2
3) 12y-3+5y=17
17y=17+3
17y=20 //:17
y=2, 8
DA DA DAAAM zrobione ;)