Question

Substitution. 1/x+2/y=2/3,2/x+3/y=5/6​

Answer 1

$\frac{1}{x} + \frac{2}{y} = \frac{23}{3} \\ \frac{y}{xy} + \frac{2x}{xy} = \frac{2}{3} \\ \frac{2x + y}{xy} = \frac{2}{3} \\ 2x + y = \frac{2}{3} \times xy \\ 2x + y = \frac{2xy}{3} \\ 3(2x + y) = 2xy \\ 6x + 3y = 2$