Question

3 banane si 5 mineole cantaresc impreuna 810 grame. Cat cantareste fiecare, daca o banana si o mineola cantaresc impreuna 220 grame?

Answer 1

3 b+5 m=810
1 b+1 m=220 l×3
3 b+5 m=810
3 b+3 m=660
5 m-3 m=810-660
2 m=150
m=150:2=75 g
1 b+75 g=220 g
1 b=220-75=145 g

Answer 2

b-banana
m-mineola
3×b+5×m=810 g
b+m=220 g
______
b,m=?
______
3 (b+m)+2m=810
3×220+2m=810
2 m =810-660
2 m=150
m=150:2
m=75 g
b=220-75
b=145 g