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aliina [53]
4 years ago
15

What is the answer to 3k=−2(7+2k)

Mathematics
2 answers:
laiz [17]4 years ago
7 0
I think k equals negative 2, or -2.<span>
</span>
love history [14]4 years ago
5 0
To solve this, we need to use the distributive property for the right side of the equation.
-2(7 + 2k). To do this, we multiply the outside number by the inside number(s).
-2(7) + -2(2k) = -14 + (-4k)
Now our equation is 3k = -4k -14.
Add 4k to both sides to get k on one side.
7k = -14
Divide by 7 to get k.
k = -2.
I hope this helps!
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Vaselesa [24]

Answer:

4:1 (I think)

Step-by-step explanation:

Let's write some equations first:

For both prices increasing by 20:

\frac{x+20}{y+20} =\frac{5}{2}

then we can use cross multiplication

2x+40=5y+100

For both prices decreasing by 5:

\frac{x-5}{y-5} =\frac{5}{1}

same here:

5y-25=x-5

Using substitution for 5y, we get: 5y=x+20

2x+40=5y+100

2x+40=x+20+100

x=80

plugging this in to the second equation:

5y-25=x-5

5y-25=80-5

5y-25=75

5y=100

y=20

therefore we get x:y=80:20

4:1

4 0
3 years ago
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lisabon 2012 [21]

Answer:

x = 15

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Step-by-step explanation:

x = 15

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6 0
2 years ago
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AB + C
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Step-by-step explanation:

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