Question

I need help need to turn in asap

Answer 1

x = 5

Explanation:

3x + 6 = 21 Subtract 6 from both sides

3x + 6 - 6 = 21 - 6

3x = 15 Divide both sides by 3

`(3x)/(3)` =
`(15)/(3)`

x = 5

I am not sure about the error. If you count each figure on the left as I unit, there are 9 units (3 rectangles and 6 squares).