${2x-3y=0}$ => ${2x=3y}$ => ${x}$ = $\frac{3}{2}$ ${y}$
Mà xy-150=0
Hay $\frac{3}{2}$ ${y}$ .${y}$ = ${150}$
$y^{2}$ = ${150}$ : $\frac{3}{2}$
$y^{2}$ = ${100}$
${=>}$ ${y=10}$ ${hoặc}$ ${y=-10}$
Nếu y=10 ⇒${x}$ = $\frac{3}{2}$ .${10}$ = ${15}$
Nếu ${y=-10}$ ⇒${x}$ = $\frac{3}{2}$. (${-10}$)= ${-15}$
