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help with this algebra fraction equation?
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can 2/5*(5*x-3)-1/3*(12*x-5) be simplified to -2x-1/2 or -2x-2 or neither
I've been stuck on this for a while i came up with -2x+0.466666666...
i need help please
3 Answers
- ?Lv 78 years agoFavorite Answer
2/5*(5*x-3)-1/3*(12*x-5)
2/5 = 0.4
1/3 = 0.34
0.4*(5*x-3)-0.34*(12*x-5)
2x-1.2-4.08x+1.7
Put them in order:
2x - 4.08x +1.7 -1.2
-2.08+0.5
= 0.5 - 2.08
= -1.58
Source(s): Becky - lenpol7Lv 78 years ago
2/5*(5*x-3)-1/3*(12*x-5)
This more clearly written as
2(5x - 3) / 5 - (12x - 5) / 3
Bring to a common denominator (bottom number ) of 15 ( = 5 x 3)
Then the left hand terms is multiplied by '3' and the right hand term by '5'
Hence
[2(3)( 5x - 3) - 5(12x - 5) ] / 15
Multiply out the brackets
[30x - 18 - 60x + 15] / 15
Collect 'like' terms in the 'square' brackets
[-30x - 3] / 15
Divide through by '15'
-30x/15 - 3/15
Cancel down
-2x - 1/5
-2x - 0.2 ( in decimal form).
So neither simplification is 'True'.
- ?Lv 44 years ago
on the grounds that this is a situation the position fractions are being further mutually, you first ought to locate an trouble-free denominator. the easy denominator of four and x might want to be 4x because thats the in trouble-free terms trouble-free dissimilar of both. once you modify the denominator of one million/4 to 4x you're multiplying the denominator by technique of x so that you may do this to the numerator besides. a million circumstances x equals x. so the first fraction is changed to x/4x. to modify the denominator of one million/x to 4x you multiply the denominator by technique of four so that you may also do this to the numerator. a million circumstances 4 is for thus the 2d fraction is 4/4x so your equation is now x/4x + 4/4x purely upload the numerators mutually the purely top answer is (x+4)/4x