8.9 + 1.2 ( 3a-1)=14.9
how to you solve it in steps
i am actually understandning these problems now, but i'm still have trouble with the steps
2007-10-08 15:45:25 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
8.9 + 1.2*(3a) - 1.2 = 14.9
8.9 + 3.6a -1.2 = 14.9
7.7 + 3.6a = 14.9
3.6a = 7.2
a = 7.2/ 3.6 = 2
2007-10-08 15:49:25 · answer #1 · answered by Marcus C 3 · 0⤊ 0⤋
first mutliply through the ()
8.9 + 3.6a - 1.2 = 14.9
simpifly
7.7 + 3.6a = 14.9
now subtract through both sides by 7.7 to get the 3.6a alone
3.6a = 7.2
now divide through both sides by 3.6 to get a by itself
a = 2
there is your answer
2007-10-08 22:49:48 · answer #2 · answered by Ms. Exxclusive 5 · 0⤊ 0⤋
8.9+1.2( 3a-1)=14.9
8.9+3.6a-1.2=14.9
7.7+3.6a=14.9
3.6a=7.2
a=2
2007-10-08 23:16:21 · answer #3 · answered by slick_licker88 3 · 0⤊ 0⤋
PEMDAS= ( ) , ^ , x , / ,+ ,-- .
parenthesis, exponents, multi or divide , add or subtract.
use them in order.
so 8.9+1.2(3a-1)=14.9
8.9+3.6a-1.2 =14.9
7.7+3.6a=14.9
3.6a=7.2
_______
3.6
a=2
2007-10-08 22:54:45 · answer #4 · answered by FagBag :( 3 · 0⤊ 0⤋
3.6 a - 1.2 = 6
3.6 a = 7.2
a = 2
2007-10-09 03:50:30 · answer #5 · answered by Como 7 · 0⤊ 0⤋