Question

Doua alune si trei nuci cantaresc 61g. Cat cantareste o nuca daca e mai grea cu 7g decat o aluna??? Va roog dau coroana

Answer 1

Răspuns:

a= cat cantareste aluna

n= cat cantareste nuca

2a+3n=61

n= a+7

2a+3(a+7)=61

2a+3a+21=61

5a=40=> a=8g

n=8+7=15g

Answer 2

Răspuns:

2a+3n=61

n=a+7

2a+3(a+7)=61

2a+3a+21=61

5a=61-21

a=40:5=>a=8g cantareste o aluna

n=8+7=>n=15 g cantareste o nuca