Forming equations
I think of a number. I add 4 and then the result is 7.
Find the number
3
x + 4 = 8
4
5x - 2 = 40 - x
7
What did the circle say to the square?
You're pointless
When 3 is taken from twice a certain number, the result is 10.
Find the equation
2x - 3 = 10
x - 7 = -2
5
3x + 3 = 2x + 7
4
What’s a math teacher’s favorite place in NYC?
Times square
I think of a number and double it.
The answer is 14.
What is the number
7
3x + 2 = 8
2
3x - 1 = 4x + 5
-6
Why was the equal sign so humble?
Because it knew it wasn’t less than or greater than anyone else.
I think of a number.
I halve it.
The result is 8
What is the number
16
3x + 4 = -8
- 4
x + 7 = 2x - 1
8
Did you hear about the mathematician who’s afraid of negative numbers?
He’ll stop at nothing to avoid them
I think of a number.
I subtract 2 from it.
I multiply the result of this by 3.
The result is 9.
Find the equation
3(x - 2) = 9
- x + 8 = 2
6
The 3 sides of a triangle are x + 2 , 3x - 9, and 2x + 1
If the perimeter = 36cm
find x
7cm
What’s the best way to make seven an even number?
Take the s out!