tolong dijawab yg ada di foto

3. x+y=5
3x+6y=24

x=y+5
3x+6y=24
3(y+5)+6y=24
3y+15+6y=24
9y=24+15
9y=39
y=39/9
y=13/3

x=13/3+5
x=28/3

hp= (28/13,13/3)

4. 2x+y =8
x-y=10
--------------- +
3x=18
x=6

2x+y=8
2x-2y=20
--------------- -
3y=-12
y=-4

hp=(6,-4)