Question

Решите систему уравнений:
 3*(х-у)=6
 6+5(х-у)=8х-2у

Answer 1

3x-3y=6
3x=3y+6
x=y+2
6+5(y+2-y)=8(y+2)-2y
6y=0
y=0
x=0+2
x=2

Answer 2

$left { {{3(x-y)=6} atop {6+5(x-y)=8x-2y}} right. left { {{3x-3y=6} atop {6+5x-5y=8x-2y}} right. left { {{3x-3y=6} atop {3x+3y=6}} + right. \ 3x+3x-3y+3y=6+6\ 6x=12\ x=12:6\ x=2\ \ 3*2-3y=6\ 6-3y=6\ -3y=6-6\ -3y=0\ y=0:(-3)\ y=0$
Ответ: (2; 0)