3/5x = 15
2007-07-18 19:32:27 · 15 answers · asked by Chronos 2 4 in Science & Mathematics ➔ Mathematics
multiply everything by 5x;
you'll get;
3=75x
x=1/25
2007-07-18 19:36:28 · answer #1 · answered by Mr. Engr. 3 · 1⤊ 1⤋
So I'm not sure what you mean is (3/5)x = 15 or 3/(5x) = 15. I will do both. The first case you want to get only x on the left side so you need to get rid of 3/5 next to x so you multiply both side with 5/3 which is opposite of 3/5. So you have:
(5/3) X (3/5)x = 15 X (5/3) from this you get 1 X x = 25 so you get x = 25.
In the second case you have 3/(5x) = 15 again you want only x on one side and all the other numbers on the other side. You flip both sides of the equation and you get:
(5x)/3 = 1/15
then to get rid of 5/3 on the left side you multiply both sides with 3/5 and you get:
(3/5) X (5x)/3 = 1/15 X (3/5)
This will give you:
1 X x = (1X3)/(15X5)
So you will get x = 0.04
2007-07-19 02:48:42 · answer #2 · answered by S M 2 · 0⤊ 1⤋
Easy if the problem is 3 over five x then
times both sides by 5x to get
3=15*5x
3=75x
then divide both sides by 75 to get
3/75=x or x= 1/25
Proof
3/(5*1/25)= 3/(5/25) = 3/(1/5) =15
2007-07-19 02:35:40 · answer #3 · answered by 037 G 6 · 1⤊ 0⤋
3/5x = 15 = 15*3/5 =x (x=25)
2007-07-19 03:10:18 · answer #4 · answered by Morty Smith C137 7 · 0⤊ 1⤋
The simplest would be to multiply both sides of the equation by 5/3 (the opposite reciprocal which when multiplied by 3/5 would give you 15/15, or 1). So 15 times 5/3 would equal 75/3, or 25
2007-07-19 02:36:48 · answer #5 · answered by yankeesrus07 2 · 1⤊ 1⤋
divide the 3.5 by it's reciprical and multiply 5/3 to 15 so x is alone. so like this
3/5x=15
(3/5 divided by 5/3)x =15
x= 15 times 5/3
x=25
2007-07-19 02:35:51 · answer #6 · answered by David 4 · 0⤊ 1⤋
actually you have to do this:
5x times 3/5x= 15 times 5x
so then the 5x gets canceled on the left side and you multiply the right side by 5x also:
3= 75x and then you try to get the x by itself so you divide both sides by 75 and you end up with
3/75=x and if you simplify you end up with
1/25=x
2007-07-19 02:44:12 · answer #7 · answered by clads 1 · 1⤊ 0⤋
taking the reciprocal of this we get 5x/3=1/15
now, multiplying both sides by 3,we get 5x=1/5.next dividing both sides by 5, we get x=1/25
2007-07-19 02:38:19 · answer #8 · answered by Anonymous · 0⤊ 1⤋
i think u divide 15 to 3/5
2007-07-19 02:35:46 · answer #9 · answered by hellokitti03^.^ 2 · 0⤊ 1⤋
if your equation is (3/5)x=15 then:
first you multiply both sides by 5 to get:
3x=15*5
3x=75
then you divide both sides by 3
x=25
if your equation is 3/(5x)=15 then:
multiply both sides by 5x
3=15*5*x
3=75*x
then divide both sides by 75
x=1/25
2007-07-19 02:35:11 · answer #10 · answered by El Conquistador 2 · 3⤊ 0⤋