3x/10 - 7x/4 = 3/20
2007-04-29 09:31:06 · 5 answers · asked by R F 1 in Science & Mathematics ➔ Mathematics
First, multiply both sides of the equation by 20 to get rid of the fractions. Then, you can simply solve for x.
3x/10 - 7x/4 = 3/20
20 * [3x/10 - 7x/4] = 20 * [3/20]
6x - 35x = 3
-29x = 3
x = -3/29
2007-04-29 09:34:01 · answer #1 · answered by Bhajun Singh 4 · 0⤊ 0⤋
a million: (2/12)x = 10 a million/6x = 10 x = 60 2: a million/2x = 40 x = 80 3: 2/3x = 20 x = 30 4: - 15m = 3 + 5m 20m = - 3 m = - 3/20 5: 2x + 5 = 11x + 5 9x = 0 x = 0 6: 2 + 7x + 8 = 3x + 10 4x = 0 x = 0 7: 3/4x = 15 x = 20 8: a million/4x + 5 = 10 a million/4x = 5 x = 20 9: 15x = 7x + 5 8x = 5 x = 5/8 10: 17x = 3x + 4 14x = 4 7x = 2 x = 2/7 11: 3x + 11 = 7x 4x = 11 x = 11/4 12: 2x + 5 = 7x + 4 5x = a million x = a million/5 13: 4x + 10 = 3x + 10 x = 0 14: 5/7x = one hundred x = 100 and forty 15: 2/3x + 7 = 21 2/3x = 14 x = 21
2016-12-05 01:56:16 · answer #2 · answered by Anonymous · 0⤊ 0⤋
3x/10 - 7x/4 = 3/20
Multiply each factor by 20
20*3x/10 - 20*7x/4 = 20*3/20
6x - 35x = 3
-29x = 3
x = -3/29
2007-04-29 09:35:39 · answer #3 · answered by Steve A 7 · 0⤊ 0⤋
3x/10 - 7x/4 = 3/20 or 6x--35x=3or -29x=3
so x=-3/29answer
2007-04-29 09:36:22 · answer #4 · answered by Anonymous · 0⤊ 0⤋
6x - 35x = 3
- 29x = 3
29x = - 3
x = - 3 / 29
(seems a rather strange answer---is question OK?)
2007-04-29 10:50:31 · answer #5 · answered by Como 7 · 0⤊ 0⤋