Question

{1/2х-1/3у=1 1/4х+2/3у=3​

Answer 1

$left { {{frac{1}{2}x-frac{1}{3}y=1|*(-0,5)} atop {frac{1}{4}x+frac{2}{3}y=3}} right. Longrightarrow left {{{-frac{1}{4}x+frac{1}{6}y=-0.5} atop {frac{1}{4}x+frac{2}{3}y=3}} right.$

$+ left {{{-frac{1}{4}x+frac{1}{6}y=-0.5} atop {frac{1}{4}x+frac{2}{3}y=3}} right. \\frac{5}{6}y=2.5\y=3\\ frac{1}{4}x+frac{2}{3}*3=3\\frac{1}{4}x+2=3\\frac{1}{4}x=1\\x=4$

Ответ: y=3; x=4