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marin [14]
3 years ago
15

-3x + 18 = 7x solve

Mathematics
2 answers:
Korolek [52]3 years ago
8 0
Answer: x = 1.8

-3x + 18 = 7x
First, isolate the variable. There’s a couple ways to do this. One is to subtract 7x from each side and subtract 18 from each side. The other is to add 3x to both sides. Either way, you end up with all the variables on one side and the rest on its own.

This would give us either…
-10x = -18
OR
18 = 10x

From there, divide by 10 to get a single x

-x = (-18/10)
-x = -1.8
Multiply each by -1 to find what positive x equals
x = 1.8
OR
(18/10) = x
1.8 = x
Harman [31]3 years ago
3 0

Answer:

refer to the attachment

Step-by-step explanation:

hope that helps

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enot [183]

That's a question about percentage.

Let's imagine that we want to know how much is 90% of 200. To do this calculation, we should multiply 200 by 90 and then divide the result by 100. We do that because 90% is the same thing that \frac{90}{100} =0,9. So, 90% of 200 is equal to:

\frac{200\cdot90}{100} =\\\\\frac{18000}{100} =\\\\180

Now, imagine that you would like to know how much is 100% of 999. First, we multiply 999 by 100 and divide the result by 999. So, 100% of a number is equal to itself. That's a very important information, because it's possible to understand this:

  • If the percentage is less than 100%, the result is less than original number.
  • If the percentage is equal to 100%, the result is equal to the original number.
  • If the percentage is greater than 100%, the result is greater than original number.

Now, we can solve our problem! \o/

The options that the percentage is less than 100% are: 35% of 300, 62% of 182 and 89% of 525. Therefore, their answers will be less than the original number.

And, the option that the percentage is greater than 100% are: 250% of 18, 300% of 250 and 120% of 72. So, their answers will be greater than the original number.

On the image, you can see the answer in a table.

I hope I've helped. ^^

Enjoy your studies! \o/

7 0
3 years ago
Point A is located at (1,5), and point M is located at (-1, 6). If point M is the midpoint of AB, find the
Step2247 [10]

Answer:

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Step-by-step explanation:

because you take how much from the first coordinate to the second and add it too the second

7 0
3 years ago
9. One box has a surface area of 96 cm2 and a height of 4 cm.
ss7ja [257]

Answer:

2,645

Step-by-step explanation:

I hope this helps and you really are smart

8 0
3 years ago
the sum of two numbers is zero. when 15 times the smaller numbers is added to 10 times the larger, the result is 1. find the two
EleoNora [17]

We have two numbers say a, b. And a system of equations.

a+b=0\wedge\dfrac{a+b}{15}+10(a+b)=1

It looks a bit intimidating but it's actually very easy.

Instead of term a + b in the second equation we can say it's zero because the first equation describes a + b as being equal to 0.

So,

\dfrac{0}{15}+10\cdot0=1\Longrightarrow 0+0=1

The above equation is not true therefore numbers a and b do not exists in the real number domain.

a,b\notin\mathbb{R}

No solution.

Hope this helps.

7 0
3 years ago
What Is the answer I am really struggling with fractions
Citrus2011 [14]
9/5 or 1 & 4/5 is the answer
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