Mathematics Knowledge

Algebra

Yesterday I presented a question about algebra.

If 3x-2 = 7, what is the value of x?

  1. 2
  2. 3
  3. 7
  4. 9

 

In working as an ASVAB tutor, I remind my students of the importance of knowing how to do algebra.

To solve for x, it is important to be able to put the x on one side of the equal sign and the number on the other side of the equal sign.

3x-2=7

The opposite operation must be performed to move a number to the other side.

3x-2=7

Add 2 to both sides.

3x = 9

To solve for x, divide by 3 on both sides.

x = 3

Did you know how to solve this problem?