if there are 3 cups and 8 cubes on one side of the scale and 7 cups and 4 cubes on the other side , how many cubes must be in each cup to maintain balance

Question

Explantion:

 

equation:

 

Solution

Answer 1

3 C + 8 = 7 C + 4

 

Take away 3 C from both sides:

 

8 = 4 C + 4

 

Take away 4 cubes from both sides:

 

4(1) = 4 C

So each cup must hold 1 cube.