bantu yaa memakai cara bsk dikumpulkan soalnya

4x+y = 7 |×2
3x-2y = 8 |×1

8x+2y = 14
3x-2y = 8
________+
11x = 22
x = 22/11
x = 2

4x+y= 7
4(2)+y = 7
y = 7-8
y = -1

hp ={2,-1}
nilai y-10x
= -1 -10(2)
= -1 -20
= -21