Question

x = 2y
2y = 3z
x+y+z = 11
encontramos: a) y = 1 b) y = 2 c) y = 3 d) y = 4

Answer 1

x=2y
2y=3z
2y/3=z
x+y+z=11
2y+y+2y/3=11
3y+2y/3=11
9y/3+2y/3=11
11y/3=11
11y=33
y=3 Letra c