2007-09-10 01:15:53 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
6 + 2a = - a - 9
3a = - 15
a = - 5
2007-09-10 07:40:59 · answer #1 · answered by Como 7 · 1⤊ 0⤋
6+2a = (-a)-9
6+2a = -a - 9 (Removing brackets)
2a+a = -9 - 6 (Switching sides so that all variables are on one side)
3a = -15 (Adding)
a = -15/3 (Switching so that a comes on one side)
a= -5 (15/5)
Solution: a= - 5
2007-09-10 09:30:28 · answer #2 · answered by Blaze 3 · 0⤊ 0⤋
6+2a= (-a)-9
6 + 2a = -a - 9
6 + 2a + a = -a - 9 + a
6 + 3a = -9
6 + 3a - 6 = -9 - 6
3a = -15
a = -15/3 = -5
2007-09-10 08:20:43 · answer #3 · answered by vlee1225 6 · 1⤊ 0⤋
Given, 6+2a= (-a)-9
= 6 + 2a = +9a. . . . { - x - = +}
= -9a + 2a = -6
= -7a = -6
= a = -6 / -7 = 6/7....{ - / - = +
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2007-09-10 09:52:58 · answer #4 · answered by Joymash 6 · 0⤊ 1⤋
7/6
2007-09-10 08:19:07 · answer #5 · answered by abcdef 1 · 0⤊ 1⤋
6 + 2a = -a - 9
Move a's to one side, numbers to the other
3a = -15
a = -5
2007-09-10 08:19:19 · answer #6 · answered by Tom :: Athier than Thou 6 · 0⤊ 0⤋
If you multiply (-a)-9 then you'd get 7a/6
If you subtract -9 from -a, then the answer's
probably around there somehwere. I'm no
good with orders of operations with those
negatives and parenthesis so you can't
completely trust my answers, haha
2007-09-10 08:25:34 · answer #7 · answered by Anonymous · 0⤊ 0⤋