Question

Which property of equality can be used to solve the equation N + 9 = -3?

Addition Property of Equality

Subtraction Property of Equality

Multiplication Property of Equality

Division Property of Equality

Answer 1

To solve the equation means to get N by itself, right?

Answer 2

hm....I think so.

Answer 3

Ok.
What operation is being done to N on the left side?

Answer 4

subtraction property of equality because you should move 9 on the other side to get n by itself

Answer 5

just blurt it out!

Answer 6

1 + 9
2 + 9
a + 9
N + 9
All the lines above show 9 being added to a number or a variable.

Answer 7

no wonder people don't come here to learn!

Answer 8

well, wouldn't it be A? because of adding?

Answer 9

In your equation, 9 is being added to N.
Since solving the equation means ending up with N alone, we need to get rid of the addition of 9.

Answer 10

or subtract?

Answer 11

What operation is the opposite of adding 9?

Answer 12

ok so subtract ?

Answer 13

Right, the opposite of adding 9 is subtracting 9.
Since when you solve an equation you must do the same operation to both sides, here you need to SUBTRACT 9 from both sides.

Answer 14

That is exactly what the Subtraction Property of Addition states.
You are allowed to subtract the same number from an equation.

Answer 15

@Nnesha
I see that you understand some algebra, and you can be helpful explaining things, but if someone is already trying to help someone else, there is no need to have someone else just blurt out the answer even if it comes with an explanation.

Answer 16

@mathstudent55
you are absolutely right my mistake :(

Answer 17

Thanks for responding.
Keep helping people.
You've got the right idea.