Пояснення:
№1
[tex]\displaystyle\\+\left \{ {{3x-2y=6} \atop {x+2y=2}} \right.\ \ \ \ \ \ 4x=8\ |:4\ \ \ \ \ \ x=2.\\\\2+2y=2\\\\2y=0\ |:2\\\\y=0.[/tex]
Відповідь: (2;0).
№2
[tex]\displaystyle\\\left \{ {{x-y=3\ |*2} \atop {3x+2y=14}} \right. \ \ \ \ \ \ +\left \{ {{2x-2y=6} \atop {3x+2y=14}} \right. \ \ \ \ \ \ 5x=20\ |:5\ \ \ \ \ \ x=4.\\\\3*4+2y=14\\\\12+2y=14\\\\2y=2\ |:2\\\\y=1.[/tex]
Відповідь: (4;1).
Объяснение:
{3х - 2у = 6
{х + 2у = 2
{4х = 8
1)
4х = 8
х = 8 : 4
х = 2
2)
х + 2у = 2
2 + 2у = 2
2у = 2 - 2
2у = 0
у = 0 : 2
у = 0
(2; 0)
{х - у = 3 | * 2
{3х + 2у = 14
{2х - 2у = 6
{5х = 20
5х = 20
х = 20 : 5
х = 4
3х + 2у = 14
3 * 4 + 2у = 14
12 + 2у = 14
2у = 14 - 12
2у = 2
у = 2 : 2
у = 1
(4; 1)
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Пояснення:
№1
[tex]\displaystyle\\+\left \{ {{3x-2y=6} \atop {x+2y=2}} \right.\ \ \ \ \ \ 4x=8\ |:4\ \ \ \ \ \ x=2.\\\\2+2y=2\\\\2y=0\ |:2\\\\y=0.[/tex]
Відповідь: (2;0).
№2
[tex]\displaystyle\\\left \{ {{x-y=3\ |*2} \atop {3x+2y=14}} \right. \ \ \ \ \ \ +\left \{ {{2x-2y=6} \atop {3x+2y=14}} \right. \ \ \ \ \ \ 5x=20\ |:5\ \ \ \ \ \ x=4.\\\\3*4+2y=14\\\\12+2y=14\\\\2y=2\ |:2\\\\y=1.[/tex]
Відповідь: (4;1).
Объяснение:
№1
{3х - 2у = 6
{х + 2у = 2
{4х = 8
{х + 2у = 2
1)
4х = 8
х = 8 : 4
х = 2
2)
х + 2у = 2
2 + 2у = 2
2у = 2 - 2
2у = 0
у = 0 : 2
у = 0
(2; 0)
№2
{х - у = 3 | * 2
{3х + 2у = 14
{2х - 2у = 6
{3х + 2у = 14
{5х = 20
{3х + 2у = 14
1)
5х = 20
х = 20 : 5
х = 4
2)
3х + 2у = 14
3 * 4 + 2у = 14
12 + 2у = 14
2у = 14 - 12
2у = 2
у = 2 : 2
у = 1
(4; 1)