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calculati: x+y=36 daca x+10+x+y+2+y=36

Răspuns :

x+10+x+y+2+y=36
x4=10+2
x4=36:12
x4=3
x=4:3
x=1,25
x+y=36
2x+2y+12=36
2x+2y=24
x+y=12