Question

докажите равенство пж помогите

Answer 1

$\frac{c(a + b) + x(a + b)}{2x(a + b) + y(a + b)} = \frac{x + c}{2x + y} \\ \frac{(c + x)(a + b)}{(2x + y)(a + b)} = \frac{x + c}{2x + y} \\ \frac{x + c}{2x + y} = \frac{x + c}{2x + y}$