Question

Proszę o pomoc.
2x+y=5
3x-2y=4,

2x+y=19
2x-2y=4

Answer 1

2x+y=5/*2
3x-2y=4

4x+2y=10
3x-2y=4
------------
4x+3x=10+4
7x=14/;7
x=2

2x+y=5
2*2+y=5
4+y=5
y=5-4
y=1

x=2
y=1
-------------------------------------------------------------------------------------

2x+y=19/*2
2x-2y=4

4x+2y=38
2x-2y=4
--------------
4x+2x=38+4
6x=42/:6
x=7

2x+y=19
2*7+y=19
14+y=19
y=19-14
y=5

x=7
y=5

Answer 2

2x + y = 5    |*2
3x - 2y = 4

4x + 2y = 10
3x - 2y = 4
------------------  +
7x = 14    /:7
x = 2

y = 5 - 2*2
y = 1

{x = 2
{y = 1

-------------------------------------------------------

2x + y = 19    |*2
2x - 2y = 4

4x + 2y = 38
2x - 2y = 4
---------------------  +
6x = 42    /:6
x = 7

y = 19 - 2*7
y = 5

{x = 4
{y = 5