Resposta :
AB//BC
B-A//C-B
(-2,-5)-(x,-3)//(-1,-3)-(-2,-5)
(-2-x,-8)//(1,2)
-2-x = -4 -8 = -4
1 2
-2-x=-4.(1)
-2-x=-4
-x=-4.(-2)
-x=-6 .(-1)
x=6
B-A//C-B
(-2,-5)-(x,-3)//(-1,-3)-(-2,-5)
(-2-x,-8)//(1,2)
-2-x = -4 -8 = -4
1 2
-2-x=-4.(1)
-2-x=-4
-x=-4.(-2)
-x=-6 .(-1)
x=6