Question

0,2:(x-2)=1/2:2 целых1/2

Answer 1

$\frac{0.2}{x - 2} = \frac{ \frac{1}{2} }{2 \frac{1}{2} } \\ \frac{0.2}{x - 2} = \frac{0.5}{2.5} \\ 0.2 \times 2.5 = 0.5(x - 2) \\ 0.5 = 0.5(x - 2) \: \: | \div 0.5 \\ 1 = x - 2 \\ x = 2 + 1 \\ x = 3$