You express the entire fraction with a common denominator (27) and then you merge the 2 fractions on the left hand side to one, then cross multiply to isolate x and find the value.
WG
The answer is either 5/3 or 3/5 depending on where x is. If its the numerator, then 3/5, if the denominator, its 5/3. Figure out where x is and you'll have the answer.
WG
Well, as it was described to me orally (I did not get to see the question) I have come to the conclusion it is the latter.
uh huh huh huh huh, he said "orally"
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You people have too much fucking time on your hands to be fucking around with that bullshit!
There are more important things that need to be done.
LOL, it was just a simply equation for kids. Why do you think someone need "too much fucking time" to calculate it? Less than 2 minutes is not too much time I believe
Now let's test my number with the original equation:
-25/27 * 3/5 + 8/9 = 0.3(3) which is 1/3
P.S. In Russia we were learning even more complicated square equations (you know ax^2 + bx + c = 0 where a <> 0) in the 4th grade (10 years old), so were learning the equations like solved above when we were even younger.
Thus your solution is wrong. The right answer is 3/5.
See:
-25/27x + 8/9 = 1/3
-25/27x + 24/27 = 9/27
-25x = 9 - 24 9-24 is not 15, rather it is -15 <------------
25/27x = 15/27
x = 15/25
x = 3/5
Now let's test my number with the original equation:
-25/27 * 3/5 + 8/9 = 0.3(3) which is 1/3 Watch your placement of x and order of operations<-----------------
P.S. In Russia we were learning even more complicated square equations (you know ax^2 + bx + c = 0 where a <> 0) in the 4th grade (10 years old), so were learning the equations like solved above when we were even younger.
The answer is 5/3
-25/27x + 8/9 = 1/3
-25/27(5/3) + 8/9 = 1/3 Brackets are important here
-25/45 + 8/9 = 1/3
-25/45 + 40/45 = 1/3
15/45 = 1/3
1/3 = 1/3 TRUE
Last edited by alex_1980; 09-24-2007, 07:48 AM.
Reason: markup
-25/27(5/3) + 8/9 = 1/3 Brackets are important here
Are you sure???
My wooden Russian brain is telling me this:
-25/27*(5/3) + 8/9 = -25/27 * 5/3 + 8/9 = -0.65432098765 which is NOT equal to 1/3.
Where did you learn the math if you don't know what -25/27*(5/3) is ABSOLUTELY EQUAL to-25/27 * 5/3?
Wanna check? Go to http://instacalc.com/ and copy-paste both formulas there. I mean these:
1) -25/27*(5/3) + 8/9
2) -25/27 * 5/3 + 8/9
You may believe me or not, but you'll get THE SAME result which is -0.65432098765. As you can see, -0.65432098765 IS NOT EQUAL to 1/3.
Now copy-paste there the right one:
-25/27 * 3/5 + 8/9
...and you'll get the correct result 0.3(3) which is 1/3.
Ah yes... you may also use the brackets if it really does matter for you, e.g.:
-25/27 * (3/5) + 8/9
-25/27 * (3/5) + (8/9)
(-25/27) * (3/5) + (8/9)
(-25/27) * (3/5) + (8/9)
(-(25)/27) * (3/5) + (8/9)
etc...
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