Question

Solve the following equations:
a)
4b = 20

Answer 1

b = 5

Explanation:

4b = 20

Whatever we do to one side of the equation, we have to do to the other.

To "isolate the variable", or get "b" by itself, we have to divide both sides by 4

4b divided by 4 is b, since "4b = 4 times b"

20 divided by 4 is 5

4b = 20

b = 5

Answer 2

b = 5

Explanation:

You want to get b on one side alone so you divide by 4.

20 divided by 4 is 5.