SOLUTION: A box contains steel balls. There are 28 balls,some weighing 3/4 kg and the others 7/8 kg each. The weight of all the balls is 22 1/2 kg. How many balls of each size are in the box

Question 1082439: A box contains steel balls. There are 28 balls,some weighing 3/4 kg and the others 7/8 kg each. The weight of all the balls is 22 1/2 kg. How many balls of each size are in the box?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let A be the number of 3/4 kg balls, B the 7/8 kg balls.
1.
.
.

Multiply both sides by 8.
2.
Multiply eq. 1 by 6 and subtract from eq. 2,

Now use either equation to solve for A.

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