Key words:
Variable: A letter that is used to represent a number in an equation. The letter represents the unknown. In the equation 5+n = 7, n is our variable.
Equation: Uses the = symbol to show two things that represent the same amounts. 5 +2 = 7 is an equation.
Look at the following word problem:
Ms. Dillon opened a pack of 20 pencils. She gave out some of the pencils. There were 6 pencils left. How many pencils did Ms. Dillon give out?
We know that ;
The total amount of pencils = number given out + number left
One equation is 20 = p + 6
We know that;
Number left = total number of pencils - number given out
A second equation is: 6 = 20-p
We know that;
Number given out = total number of pencils - number left
A third equation is: p = 20 - 6
Click on the following link and work on solving equations with variables!
https://forms.gle/gr9DiTJPQhYtbEuy5
