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solong [7]
3 years ago
7

HELP!! Simplify 12+3(8+x)

Mathematics
2 answers:
JulsSmile [24]3 years ago
8 0
12+3(8+x)
Distribute 3 to what’s inside the parentheses
12 + (3•8)+(3•x)
12 + 24 + 3x
Combine similar terms
36 + 3x is the answer
cestrela7 [59]3 years ago
3 0

Answer:

24

Step-by-step explanation:

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Given -3(2x+7)=-29-4x prove x=4
Doss [256]

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3 years ago
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Please explain how to do this, I'm using all my points<br><br>A. 40 L<br>B. 80 L<br>C. 4 L <br>D. 8L
exis [7]

Answer: choice A. 40 liters

====================================

Explanation:

x = number of liters of the 50% alcohol solution

If we have x liters of 50% alcohol, then we have 0.50*x liters of pure alcohol. This is added to 0.90*40 = 36 liters of pure alcohol (from the 90% solution).

So far we have 0.50*x + 36. This expression represents the total amount of pure alcohol. We want a 70% solution, so we want 70% of the total 40+x meaning 0.50*x + 36 is to be set equal to 0.70*(40+x) and we solve for x as shown below

0.50*x + 36 = 0.70*(40+x)

0.50*x + 36 = 0.70*(40)+0.70*(x)

0.50*x + 36 = 28+0.70*x

36 - 28 = 0.70*x - 0.50x

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0.20x = 8

x = 8/0.20

x = 40

So that is why the answer is choice A. 40 liters

6 0
3 years ago
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