x-3/7 + x+9/3 = 9/7
find x
I am so lost
2007-09-16 19:27:07 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
I`m guessing question should read:-
(x - 3) / 7 + (x + 9) / 3 = 9 / 7
3 x - 9 + 7 x + 63 = 27
10 x + 54 = 27
10 x = - 27
x = - 27 / 10
2007-09-17 01:25:01 · answer #1 · answered by Como 7 · 2⤊ 0⤋
x-3/7 + x+9/3 = 9/7
2x - 3/7 + 9/3 = 9/7
2x = 9/7 + 3/7 - 9/3
2x = 9/7 + 3/7 - 3
2x = 12/7 - 3
x = 6/7 - 1/2
x = 6/14
x = 3/7
wow that was very bad form but at least you can kind of see exactly what I did
2007-09-16 19:31:30 · answer #2 · answered by Philip S 4 · 0⤊ 0⤋
x - 3/7 + x + 9/3 = 9/7
2x = 3/7 - 9/3 + 9/7
2x = (3 + 9)/7 - 3
2x = 12/7 - 3
you can write -3 as -21/7
So,
2x = 12/7 - 21/7 = -9/7
x = -9/14
2007-09-16 19:44:31 · answer #3 · answered by Christine P 5 · 0⤊ 0⤋
x + x +9/3 -3/7 -9/7 = 0
2x + 9/7 = 0
2x = -9/7
x= -9/14 #
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2007-09-16 19:34:12 · answer #4 · answered by leeyeah_xpe 2 · 0⤊ 0⤋
2x=9/7+3/7-9/3
2x=(27+9-63)/21
2x=-27/21
x=-9/14
2007-09-16 19:48:56 · answer #5 · answered by criselda 3 · 0⤊ 1⤋