Question

Найдите решение системы уравнений:
1) {4х+9у-9=0
{5х-6у-17=0

Answer 1

{4х+9у=9|×2///////{8х+18у=18
{5х-6у=17|×(3)//{15х-18у=51
` ________________

` {23х=69/////{х=3
{12+9у=9////{9у=-3/////{у=-(1÷3)