Question

решите систему уравнений
3х+4у=11
5х-2у=1

Answer 1

$\left \{ {{3x+4y=11} \atop {5x-2y=1}} \right.$

$\left \{ {{3x=11-4y} \atop {5x-2y=1}} \right.$

$\left \{ {{x= \frac{11-4y}{3} \atop {5* \frac{11-4y}{3}-2y=1 }} \right.$

5*$\frac{11-4y}{3}$-2y=1
$\frac{55-20y}{3}$-2y=1 | *3

55-20y-6y=3
26y=52 | :26
y=2