Question

18/21=?/7
плз спасайте 10 балов

Answer 1

18*7/21................ Равно 6

Answer 2

$\frac{18}{21} = \frac{x}{7 } \\ \frac{18 \div 3}{21 \div 3} = \frac{x}{7} \\ \frac{6}{7} = \frac{x}{7} \\ 6 = x \\ x = 6$