Combining Like Terms

Question

1. 3a + a = 16
2. 9x - 3x = 30
3. 5w + 3w = 24

I really need help with this, can you at least do one or two for me so I can do the other problem.

Answer 1

1.
3a + a = 16
4a = 16
a = 16/4
a = 4

2.
9x - 3x = 30
6x = 30
x = ?

I'll be glad to check your answers for #s 2 and 3.

Answer 2

how did you got 4 for #1????

and 6 for #2????

Answer 3

3a + a = 4a

9x - 3x = 6x

Answer 4

can you please explain to me for #1
and for #2 is the answer is 5???

Answer 5

never mind about #1 since you already explain it to me

but is my asnwer is correct for #2?

Answer 6

because 30/5 is 6

Answer 7

Yes