1/8x + 3/4 = 5/2
2006-10-29 10:31:40 · 8 answers · asked by Advisor 1 in Science & Mathematics ➔ Mathematics
Since 8 is the LCM of the 3 fractions, why don't you multiply both sides by 8 to get rid of the fractions?
8(1/8x) + 8(3/4) = 8(5/2)
x + 6 = 20
So, x = 14.
That's a neat trick when you have fractions in an equation.
2006-10-29 10:35:45 · answer #1 · answered by tlf 3 · 0⤊ 0⤋
1/8x + 3/4 = 5/2 multiply throughout by 8
x + 24/4 = 40/2
x + 6 = 20 subtract 6 from both sides of the equation
x = 14
2006-10-29 18:40:57 · answer #2 · answered by rosie recipe 7 · 0⤊ 0⤋
1/8x + 3/4=5/2
- 3/4 -3/4
8(1/8x)= (14/8)8
x=14
2006-10-29 18:35:39 · answer #3 · answered by Sarah S 3 · 0⤊ 0⤋
1/8x = 5/2 - 3/4 = (10-3)/4 = 7/4
(1/8)x = 7/4
x = 8*7/4 = 2*7 = 14
1/(8x) = 7/4
8x = 4/7
x = 4/(7*8) = 1/14
2006-10-29 18:53:13 · answer #4 · answered by Helmut 7 · 0⤊ 0⤋
14
2006-10-29 18:34:29 · answer #5 · answered by Norm 3 · 0⤊ 0⤋
(1/8)x + (3/4) = (5/2)
(1/8)x = (5/2) - (3/4)
(1/8)x = (10/4) - (3/4)
(1/8)x = 7/4
x = (7/4) / (1/8)
x = (7/4) * (8/1)
when you divide by a fraction you can multiply by the reciprocal
x = (7 * 8) / (4 * 1)
x = 56/4
x = 28/2
x = 14
2006-10-29 18:39:29 · answer #6 · answered by rachie_grl6 2 · 0⤊ 0⤋
i believe the answer is 1/14
2006-10-29 18:34:55 · answer #7 · answered by Anonymous · 0⤊ 0⤋
x..... = ...... 12?????
2006-10-29 18:37:00 · answer #8 · answered by Rick S 1 · 0⤊ 1⤋