Question

Система уравнений
x+y=5
3x-2y=3

Answer 1

$\left \{ {{x+y=5} \atop {3x-2y=3}} \right. \left \{ {{x=5-y} \atop {3x-2y=3}} \right.\\ \\ 3(5-y)-2y=3 \\15-3y-2y=3 \\15-5y=3 \\-5y=3-15 \\-5y=-12 \\y= \frac{12}{5}\\ \\ x=5- \frac{12}{5}\\ \\ x= \frac{13}{5}\\ \\(x.y)=( \frac{13}{5} . \frac{12}{5}$