Question

I have a two questions.
How do you do these types of problems and what are their answers?
*Is -7 + 9 = -9 + 7 true, false, or open?
**Is 4x - 3 = 19 true, false, or open?

Thanks.

Answer 1

You do these types of problems by calculating :
* -7 + 9 = -9 + 7 => 2=-2
So it's false.
** 4x - 3 = 19 => x=22/4
So this is open (only true when x=11/2 )

Answer 2

oh ok. so I do each side and if they are equal it's true. If not it's false. If it has a letter (algebraic equation) it's open.

Answer 3

Yep, and you solve for that letter first, if there is a solution then it's open if there isn't you check if it's true or false.

Answer 4

ok. thanks so much!

Answer 5

Welcome !