What is the difference between an expression and an equation?
An expression does not have an equal value assigned to it.
Ex: 3 + 4 and 7 x 5 are both expressions.
An equation has an equal value assigned to it.
Ex: 3 + 4 = 7 and 7 x 5 = 30 are both equations.
The value on either side of the equal sign (=) must be the same.
Here is how it looks when using a balance scale to model it.
Here are some examples of equation solutions that contain variables (unknown numbers or values):
When a number sits directly against a variable (such as 25c), it represents multiplication (25 x c).