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kondaur [170]
3 years ago
5

12x─ 15 = 6 ─ 3x answered as a fraction

Mathematics
2 answers:
KiRa [710]3 years ago
8 0

Answer:

x is equal to one and two fifths.

Step-by-step explanation:

Given:

12x - 15 = 6 - 3x

Let's start by noticing that every term in that equation is divisible by 3.  That means we can factor 3 out of it, giving us:

4x - 5 = 2 - x

Now we'll add x to both sides:

4x + x - 5 = 2 - x + x

5x - 5 = 2

An then we add 5 to both sides:

5x - 5 + 5 = 2 + 5

5x = 7

Finally, we can divide both sides by 5 to get the final answer:

5x ÷ 5 = 7 ÷ 5

x = 7/5

To put that in proper form it would be:

x = 1 \frac{2}{5}

telo118 [61]3 years ago
5 0

Answer:

x=1.4 or 21/15

Step-by-step explanation:

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A book store has twice as many history books as science books. The store has 81 history and science books altogether how many of
atroni [7]

let h= history books

science books = s

h=2s  there are 2 times as many history as science so to get them equal we double the science

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2s+s=81   substitute 2s for h in the above equation

3s = 81   combine like terms

s = 27

There are 27 science books

h=2s

h=2(27)

h=54

there are 54 history books

4 0
3 years ago
there are 8 students on the minibus. five of the students are boys. what fraction of the students are boy
meriva
Students on the minibus = 8
students that are boys = 5
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we can write fraction as the numerator and denominator so here the fraction of boys students is =  5/8
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4 years ago
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irakobra [83]
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2 years ago
Jim bought a dozen doughnuts for $5. He sold each doughnut for $1. What is Jim's profit?
olga nikolaevna [1]

Answer:

D)  $7

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The money made from a dozen donuts is

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Natalija [7]

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