Question

выразите у через х х+2у=6,х-4у=0, 4х+2у= -4,-6х+3у=0

Answer 1

x+2y=6
$y= frac{6-x}{2}$

x-4y=0
$y= frac{x}{4}$

4x+2y=-4
$y= frac{-4-4x}{2}$

-6x+3y=0
$y= frac{6x}{3} = 2x$