Question

Решить (2х+5х=36 2х-5у=-44

Answer 1

$left { {{2x+5x=36} atop {2x-5y=-44}} right.$

$left { {{x= frac{36}{7} } atop {2x-5y=-44}} right.$

$2 * frac{36}{7} - 5y = -44 y = frac{76}{7}$

$(x,y) = ( frac{36}{7}, frac{76}{7})$

$left { {{2 * frac{36}{7}+5 * frac{36}{7} = 36 } atop {2 * frac{36}{7} - 5 * frac{76}{7} = -44 }} right.$

$left { {{36=36} atop {-44=-44}} right.$

Ответ: $(x,y)=( frac{36}{7}, frac{76}{7})$