Question

valor da proporçao
y/2=15/10

Answer 1

$\color{dodgerblue}{\frac{y}{2}=\frac{15}{10}}$

$\color{dodgerblue}{\cancel2.\frac{y}{\cancel2}=\frac{15}{\cancel10_{5}}. \cancel2}$

$\color{dodgerblue}{y=\frac{15}{5}}$

$\colorbox{black}{\color{cyan}{y = 3}}\colorbox{blue}{\color{yellow}{\checkmark}}$

Answer 2

$\frac{y}{2} = \frac{15}{10} \\ y \times 10 = 2 \times 15 \\ 10y = 30 \\ y = \frac{30}{10} \\ y = 3$