Simplify this plz!! 4-2x/3 = 21/12 - 5x-3/4?
回答 (7)
2009-07-01 3:29 pm
✔ 最佳答案
(4 - 2x)/3 = 21/12 - (5x - 3)/4(4 - 2x)/3 = (21 - 15x + 9)/12
4 - 2x = (30 - 15x)/4
16 - 8x = 30 - 15x
7x = 14
x = 2
Answer: x = 2
Proof:
(4 - 2[2])/3 = 21/12 - ([5{2} - 3]/4)
(4 - 4)/3 = 7/4 - ([10 - 3]/4)
0/3 = 7/4 - 7/4
0 = 0
2009-07-01 6:21 pm
first take LCM
LCM IS 12
so
12*4-2x/3=12*21/12-12*5x-3/4
now cancel the denominators with 12 and u get
4(4-2x)=21-3(5x-3)
16-8x=21-15x+9
group the like terms add or subtract
-8x+15x=21+9-16
7x=14
x=2
LCM IS 12
so
12*4-2x/3=12*21/12-12*5x-3/4
now cancel the denominators with 12 and u get
4(4-2x)=21-3(5x-3)
16-8x=21-15x+9
group the like terms add or subtract
-8x+15x=21+9-16
7x=14
x=2
2009-07-01 6:02 pm
4-2x/3 = 21/12 - 5x-3/4
4-(2 x)/3 = 1-5 x
13 x+9 = 0
x = -9/13
4-(2 x)/3 = 1-5 x
13 x+9 = 0
x = -9/13
2013-09-25 2:59 pm
4 - 2x/3 = 21/12 - 5x - 3/4
48 - 8x = 21 - 60x - 9
52x = -36
13x = -9
x = -9/13
48 - 8x = 21 - 60x - 9
52x = -36
13x = -9
x = -9/13
2009-07-05 5:31 pm
4 - 2x/3 = 21/12 - 5x - 3/4
4 - 2x/3 = 1 - 5x
x = -9/13
x = -0.692308
4 - 2x/3 = 1 - 5x
x = -9/13
x = -0.692308
2009-07-05 1:43 pm
4(4-2x)=21-3(5x-3)
16-8x=21-15x+9
16-8x=30-15x
7x=14
x=2
16-8x=21-15x+9
16-8x=30-15x
7x=14
x=2
2009-07-01 9:21 pm
(4 - 2x)/3 = 21/12 - (5x - 3)/4
12[(4 - 2x)/3] = 12[21/12 - (5x - 3)/4]
4(4 - 2x) = 21 - 3(5x - 3)
4*4 - 4*2x = 21 - 3*5x + 3*3
16 - 8x = 21 - 15x + 9
15x - 8x = 21 - 16 + 9
7x = 14
x = 14/7
x = 2
12[(4 - 2x)/3] = 12[21/12 - (5x - 3)/4]
4(4 - 2x) = 21 - 3(5x - 3)
4*4 - 4*2x = 21 - 3*5x + 3*3
16 - 8x = 21 - 15x + 9
15x - 8x = 21 - 16 + 9
7x = 14
x = 14/7
x = 2
收錄日期: 2021-05-01 12:34:18
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