Question

A sleeping bag weighs 8 pounds. Your backpack and sleeping bag together weigh 31 pounds. Write an equation to determine whether the backpack without the sleeping bag weighs 25 or 23 pounds.

Answer 1

X+8=31 ----->X=31-8 ---->X=23

Answer 2

sleeping bag⇒S
backpack⇒B
S=8 pounds
S+B=31
8+B=31
B=31-8
B=23 pounds

Answer: 23 pounds