{ x+3y=8 ----- / *(-7)
{7x-2y=10
-7x - 21y = -56
7x - 2y = 10
-------------------
-23y = -46
y = 2
x + 3y = 8
x = 8 - 3 * 2
x = 2
{5x-2y=3--- / * 2
{3x+4y=7
10x - 4y = 6
3x + 4y = 7
13x = 13
x = 1
3 + 4y = 7
4y = 7 -3
4y = 4
y = 1
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{ x+3y=8 ----- / *(-7)
{7x-2y=10
-7x - 21y = -56
7x - 2y = 10
-------------------
-23y = -46
y = 2
x + 3y = 8
x = 8 - 3 * 2
x = 2
x = 2
y = 2
{5x-2y=3--- / * 2
{3x+4y=7
10x - 4y = 6
3x + 4y = 7
-------------------
13x = 13
x = 1
3x + 4y = 7
3 + 4y = 7
4y = 7 -3
4y = 4
y = 1
x = 1
y = 1