i cant figure out this stupid problem. plz help me! i m using the distibutive property and i must show all work.
the directions say to simply the expression.
12a+3+18-9a=
2007-09-18 13:38:06 · 5 answers · asked by ringostarr9911 2 in Science & Mathematics ➔ Mathematics
3a+21 i think.
2007-09-18 13:44:21 · answer #1 · answered by afi_punkie 1 · 0⤊ 0⤋
12a+3+18-9a
= 3a + 21
= 3(a+7)
2007-09-18 13:45:55 · answer #2 · answered by ironduke8159 7 · 0⤊ 0⤋
simplify the expression:
12a + 3 + 18 - 9a
we need to simplify the numbers with a variable
12a - 9a
and the numbers without a variable
3 + 18
3a + 21
2007-09-18 13:45:37 · answer #3 · answered by sfroggy5 6 · 0⤊ 0⤋
Add Like Terms
12a + 3 + 18 - 9a
12a + 21 - 9a
3a + 21
Factor Out.
You can take out 3 out of (3a + 21)
So your answer would be
3(a + 7)
2007-09-18 13:48:40 · answer #4 · answered by Reetchie12 2 · 1⤊ 0⤋
12a-9a=3a
3+18=21
21+3a <~ and there's your simplified answer
2007-09-18 13:45:33 · answer #5 · answered by Anonymous · 0⤊ 0⤋