Question

X+2y=3si 0.2x-3.5y=4 sistem dau 10 puncte

Answer 1

$\left \{ {{x+2y=3} \atop {0,2x-3,5y=4}} \right. \\ \left \{ {{x+2y=3} \atop {x-17,5y=20}} \right. \\ 19,5y=-17 \\ y=- \frac{17}{19,5};x=3+ \frac{34}{19,5}$