how do you do this?
2006-10-12 10:26:54 · 7 answers · asked by Ashli E 1 in Education & Reference ➔ Homework Help
Ok- You start with your equation
a+6a-9=30
*Then combine like terms and get
7a-9=30
**Then add nine to both sides
7a=39
***Divide by seven on both sides
a=5.57 (long decimal so i rounded)
2006-10-12 10:29:54 · answer #1 · answered by Rocky 4 · 0⤊ 0⤋
Get yours a's on one side, and your numbers on the other, then solve for a:
a + 6a - 9 = 30
Add 9 to both sides to get:
a + 6a = 39
Combine your a terms:
7a = 39
Divide both sides by 7:
a = 39/7
And, voila, there is your answer.
Hope that helped. You can solve all problems of this type with this same methodology.
Good luck! :-)
2006-10-12 17:29:44 · answer #2 · answered by I ♥ AUG 6 · 0⤊ 0⤋
a + 6a - 9 = 30
7a = 39
a = 39/7
2006-10-12 17:35:11 · answer #3 · answered by JennyAnn 4 · 0⤊ 0⤋
don't think i am a nerd... u do 6a+a=7a OK and 7a-9=2a and 30 divided by 2 and a=15
a+6a-9=30
7a-9=30
2a=30
30 divided by 2
a=15
2006-10-12 17:35:37 · answer #4 · answered by art_cat_fan 2 · 0⤊ 0⤋
a+6a-9=30
7a-9=30
7a=39
a=7/39 or 0.18
2006-10-12 17:39:40 · answer #5 · answered by Missy 3 · 0⤊ 0⤋
7a-9=30
7a=39
a=39/7
and normally you should leave it in the fraction form because if you put it in decimal form the answer will not be the same when plugged in for a
2006-10-12 17:35:04 · answer #6 · answered by Anonymous · 0⤊ 0⤋
a=3.25
2006-10-12 17:32:06 · answer #7 · answered by Doug H 1 · 0⤊ 0⤋