hello all... i need some math help.
-2/3a+1=2. the answer is a=0. I come up with -1!! please tell me what i am doing wrong and tell me how you got to the correct answer. thanks so much!
2007-06-14 13:48:51 · 6 answers · asked by Cat 1 in Science & Mathematics ➔ Mathematics
0 is not the right answer.
-2/3x+1=2
subtract 1 from each side
-2/3x=1
multiply each side by -3/2 (to cancel out -2/3)
and your answer is -3/2
2007-06-14 13:54:42 · answer #1 · answered by packingslip 2 · 0⤊ 0⤋
first you have to subtract one, so you get -2/3a=1. then you must multiply by the recipracal. So... (-3/2)-2/3a=1(-3/2). My answer is a= -3/2. This answer is right because if you plug it in for a you get 6/6 +1 = 2
2007-06-14 13:58:31 · answer #2 · answered by evilmidgt999 2 · 0⤊ 0⤋
Let " -2/3a " = x and x + 1 = 2 or x = 1
Now solve -2/3a = 1
- 2a / 3 = 1 , - 2a = 3 , a = - 3 / 2
- 2 / ( 3a ) = 1 , - 2 = 3a , a = - 2 / 3
- 2 / 3a = 1 , a = ?
2007-06-14 14:26:31 · answer #3 · answered by Zax 3 · 0⤊ 0⤋
-2/3 * a + 1 = 2
minus one on both sides
-2/3 * a = 1
divide by -2/3
a = 1/(-2/3)
a = -1.5
2007-06-14 13:55:01 · answer #4 · answered by krahjerdi 2 · 0⤊ 0⤋
I think you've gotten the problem written down wrong. As you've stated it, there's no way a could be 0 --or-- -1 ☺
Doug
2007-06-14 13:54:40 · answer #5 · answered by doug_donaghue 7 · 0⤊ 0⤋
It can't be 0...because -2/3(0) = 0
I agree with you
2007-06-14 13:53:56 · answer #6 · answered by AnswerMan 2 · 0⤊ 0⤋