Question

What is the answer to this problem -2b+6=-2b-2b?

Answer 1

-3

Explanation:

-2b+6=-2b-2b

We move all terms to the left:

-2b+6-(-2b-2b)=0

We add all the numbers together, and all the variables

-2b-(-4b)+6=0

We get rid of parentheses

-2b+4b+6=0

We add all the numbers together, and all the variables

2b+6=0

We move all terms containing b to the left, all other terms to the right

2b=-6

b=-6/2

b=-3

Answer 2

6 = -2b (cancel -2b on both sides)

6/-2 = b (divide both sides by -2)

-3 = b (simplify 6/2 to 3)

now switch sides

Answer: b = -3