Question

sendo a//b//c, determine x e y

Answer 1

AB + AC/AC= DE + DF/DF = x+27/27=4+9/9

9x+243=108+243
9x=108 +243 -243
x= 108/9
x=12

y=27-x
y=27-12
y= 15


x=12 e y= 15