Math 8R  help!!!!!!!
posted by Laruen .
Combining Like Terms
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.

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. 
how did you got 4 for #1????
and 6 for #2???? 
3a + a = 4a
9x  3x = 6x 
can you please explain to me for #1
and for #2 is the answer is 5??? 
never mind about #1 since you already explain it to me
but is my asnwer is correct for #2? 
because 30/5 is 6

Yes