Răspuns :
x-nr mandarinelor
3x-nr bananelor
3x+4=5x
3x-5x = -4
-2x= -4
2x=4
x=2 -mandarine
2*3=6-banane
3x-nr bananelor
3x+4=5x
3x-5x = -4
-2x= -4
2x=4
x=2 -mandarine
2*3=6-banane
B=banane
M=mandarine
B=3M
B+4=5M⇒B=5M-4
5M-4=3M
5M-3M=4
2M=4
M=4:2
M=2
B=3M
B=3*2
B=6
M=mandarine
B=3M
B+4=5M⇒B=5M-4
5M-4=3M
5M-3M=4
2M=4
M=4:2
M=2
B=3M
B=3*2
B=6