(x + 3) divided by 2
third option
Answer:
third optionStep-by-step explanation:
Respuesta:
Step-by-step explanation:
7 libros
12 - 19 ⇒ 7
12
sum of all angles of triangle =180
3x-12+2x+11x=180
16x-12=180
16x=192
x=12