koordinat titik potong antara garis x+2y=10 dan 3x-y=16 adalah... A).(2,2) B).(6,2) C).(1,3) D).(0,0)

jawab


x + 2y = 10....kalikan 3
3x - y = 16

3x + 6y  = 30
3x - y = 16 .......(-)
7y = 14
y = 2

x + 2y = 10
x + 2(2) = 10
x + 4 = 10
x = 6

HP(x,y)= (6,2)