rate+gaini=63 rate=2×gaini rate=? gaini=?​

Răspuns :

Rate = a

Gaini = b

2b+b=63

3b=63

b=63÷3=21

a=21×2=42

Răspuns:

r+g=63

r=2g

2g+g=63

3g=63

g=21 gaini

r=42 rate

verificare 21+42=63