3x/4 - 5x/12=5
2007-01-17 12:38:57 · 14 answers · asked by Meggg 1 in Science & Mathematics ➔ Mathematics
its been a while since ive done algebra, but i believe it is x=15
either that or
1x/3=5 i know this ipart is right, but i dont know if i siomplified it correctly on the top part.
2007-01-17 12:44:11 · answer #1 · answered by satnlafsasurot@sbcglobal.net 2 · 0⤊ 0⤋
3x/4 - 5x/12 = 5
[9x - 5x]/12 = 5
4x /12 = 5
4x = 5*12
4x = 60
x = 60/4
x = 15
2007-01-17 20:47:34 · answer #2 · answered by Brenmore 5 · 1⤊ 0⤋
What's happening to the quality of teaching?
Multiply through the above by least common denominator (in this case, it's 12) ==> 12(3x/4 - 5x/12) = 12*5
9x - 5x = 60 ... solve for x.
2007-01-17 20:42:54 · answer #3 · answered by mjatthebeeb 3 · 2⤊ 0⤋
First you want to get a common denominator, and that would be 12...so take 3x and multiply it by 3, and it's denominator by 3. You then have 9x/12-5x/12=5. Multiply through by twelve to get rid of fractions. 9x-5x=60. 9-5=4. so 4x=60. divide by 4. x=15.
2007-01-17 20:43:54 · answer #4 · answered by mcollum83 3 · 1⤊ 0⤋
3x/4-5x/12=5
12 is the LCD
9x-5x=60
4x=60
x=15
2007-01-17 20:43:39 · answer #5 · answered by Dave aka Spider Monkey 7 · 1⤊ 0⤋
3x/4-5x/12=5
=> 3X3x-5x=5X12 [multiplying both sides by 12]
=>9x-5x=60
=>4x=60
=>x=60/4=15 ans
2007-01-17 21:07:27 · answer #6 · answered by alpha 7 · 0⤊ 0⤋
15
2007-01-17 20:41:54 · answer #7 · answered by Anonymous · 2⤊ 1⤋
(1/3)x = 5
x = 15
2007-01-17 20:43:41 · answer #8 · answered by J J 3 · 1⤊ 0⤋
x = 15
2007-01-17 20:42:52 · answer #9 · answered by staca 2 · 2⤊ 1⤋
3x/4 - 5x/12=5
(3*3x / 4*3) - 5x/12=5
9x/12-5x/12= 5
4x/12=5
4x=60
x=15
2007-01-17 20:43:02 · answer #10 · answered by 7 · 2⤊ 1⤋
3x/4 - 5x/12 = 5
9x/12 - 5x/12 = 5
4x/12 = 5
4x = 60
x = 15
2007-01-17 20:42:35 · answer #11 · answered by red8679x 2 · 2⤊ 1⤋