Equations

You can work with a letter without even thinking about the specific number or numbers. These variables used as symbols and stand for an unknown value. You can begin using various letters instead of a box in your open sentences. This thinking can help you solve problems by creating equations.

Consider: 4 + 5 = 9

This is similar to: n + 5 = 9. Solving for n:

n + 5 = 9
4 + 5 = 9
n = 4

y + 6 = 10
y = 10 – 6
y = 4

Questions: