Multiplication Property of Equality
General equation: Ax + B = C x + D (A, B, C, D are real numbers.).
More often the equations have constants that are a mixture of fractions
and integers. Generally, it is better to multiply the equation by
the LCD to clear the fractions.
i) Simplify the equation so that there are only integers on
both sides
ii) Then solve simplified equations vertically  using the
balance beam.
Example 1:
Solve 

Multiply LCD: 



Solve vertically: 



Add Opps: 

Check: 

General equation: Ax + B = C x + D (A, B, C, D are rational numbers.).
i) Simplify the equation so that there are only integers on
both sides
ii) Then solve simplified equations vertically  using the
balance beam.
Example 2:
