Question

A bag contains 2 steel balls and 5 brass balls. The total weight is 13 pounds. If 2 steel balls are added and 2 brass balls are removed, the weight decreases to 12 pounds. How much does each kind of ball weigh?

Answer 1

Explanation:

The answer above this answer is correct

Answer 2

Solve using system of equations.
s=number of steel balls
b=number of brass balls
2s+5b=13
4s+3b=12
Multiply first equation by -2 to get -4s-10b=-26
add the two equations
-7b=-14
Simplify
b=2 now substitute 2 for b in any equation to get s=1.5