Quick and dirty here, change everything to a common denominator of 15:
(12x-9)/15 - (20-10x)/15 = (15)/15
Now we can just get rid of the denominators:
12x -9 -20 -10x = 15
Combining terms gives us:
12x -10x -9 -20 = 15
2x - 29 = 15
isolate x:
2x = 15+29 --> 2x = 44
x = 22
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OpenStudy (anonymous):
No. If you have a minus before the fraction the signals inside it will change
OpenStudy (anonymous):
so you have 12 + 10, and not 12 -10
OpenStudy (firejay5):
@qweqwe123123123123111 Is right, because that's what I have too?
OpenStudy (firejay5):
which is the right answer? Figure it out for me please!!! :D
OpenStudy (anonymous):
mine
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OpenStudy (anonymous):
I am sure
OpenStudy (anonymous):
The sign only changes if you're multiplying or dividing terms
OpenStudy (anonymous):
but that is the sameas multpiplying what is inside the fraction by minus 1
OpenStudy (anonymous):
All that's going on here is addition and subtraction.
"Scaling" a fraction doesn't change any signs.
OpenStudy (anonymous):
you are wrong. Go ask your teachers
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