Tolong jawab sekali-kali saya nanya hehehe (pakai cara ya please) Gede point nye

y-y1/y2-y1=x-x1/x2-x1
y-7/-1-7=x-(-4)/10-(-4)
y-7/-8=x+4/14
14(y-7)=-8(x+4)
14y-98=-8x-32
8x+14y=-32+98
8x+14y=66
_________÷2
4x+7y=33