Question

докажите равенство пж помогите

Answer 1

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