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goldfiish [28.3K]
3 years ago
5

Simplify -12x + 5x. please need it to pas class 50 points and please only answer if correct

Mathematics
2 answers:
Gala2k [10]3 years ago
5 0

im so sorry but if you were thinking its right its wrong

-BARSIC- [3]3 years ago
4 0
-12x+5x=x(-12+5)=x(-7)=-7x
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1. We assume, that the number 3000 is 100% - because it's the output value of the task. 
<span>2. We assume, that x is the value we are looking for. </span>
<span>3. If 100% equals 3000, so we can write it down as 100%=3000. </span>
<span>4. We know, that x% equals 600 of the output value, so we can write it down as x%=600. </span>
5. Now we have two simple equations:
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where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
100%/x%=3000/600
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7. Solution for 600 is what percent of 3000

100%/x%=3000/600
<span>(100/x)*x=(3000/600)*x       - </span>we multiply both sides of the equation by x
<span>100=5*x       - </span>we divide both sides of the equation by (5) to get x
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