Question

4x+y=3 решить методом подстановки 6x-2y=1

Answer 1

$\left \{ {{4x+y=3/*2} \atop {6x-2y=1}} \right. \\ \\ \left \{ {{8x+2y=6} \atop {6x-2y=1}} \right. \\ 14x=7\\x=7/14\\x=0.5\\2+y=3\\y=1 \\ \\ \left \{ {{y=1} \atop {x=0.5}} \right.$

Answer 2

2у= 6х-1
у = 3-4х, 2у = 6-8х
6х-1 = 6-8х, 6х-1-6+8х = 0
14х-7 = 0
14х = 7, х = 1/2
4*1/2 + у = 3, 2+у=3, у = 1