tolong di bantu kak!! itu betul tidak?kalau salah tolong di betulkan ya...

(1)
2x + 3y = 5 {x1}
x + 4y = 10 {x2}
--------------------
2x + 3y = 5
2x + 8y = 20
---------------- -
-5y = -15
y = 3

y = 3 => 2x + 3y =5
2x + 3y =5
2x + 3(3) = 5
2x + 9 = 5
2x = 5 - 9
2x = -4
x = -2
HP{-2,3}
(2)
6x + 4y = 8 {x1}
2x + y = 6 {x4}
---------------------
6x + 4y = 8
8x + 4y = 24
---------------- -
-2x = -16
x = 8

x = 8 => 2x + y = 6
2x + y = 6
2(8) + y = 6
16 + y = 6
y = -10
HP{8,-10}