Addition Equations

What is a variable?

• A letter used to represent a number that we don't know.

• A number used to represent a letter that we don't know.

• I have no idea.

• When both side of an equation are equal.

3 + x = 6

x = ?

3 + x = 9

x = ?

x + 4 = 9

x = ?

x + 3 = 7

x = ?

x = ?

x = ?

x = ?

x = ?

What is an equation?

• Both sides of the equal sign are exactly the same.

• When ever you add two things together

• Anything that has an 'x' in it.

• When you subtract a number from both sides.