Question

Karine corre x Carla corre x + 3 min Paula corre mais q as duas e 8 min a mais q Carla totalizando 35 min. Quanto corre Karine? A 10 B 12 C 14 D 16

Answer 1

Karine=x
Carla= x+3
Paula=x+3+8=>x+11

$x+x+3+x+11=35\\3x+14=35\\3x=35-14\\3x=21\\x= \frac{21}{3}\\\\\boxed{\boxed{x=7}}$