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Semmy [17]
3 years ago
8

Build an equation with at least three different operations that has solution x=2

Mathematics
1 answer:
spayn [35]3 years ago
8 0

Answer: (10x+7)/2 = -13/2

This is not the only answer possible. There are infinitely many possible answers.

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

Explanation:

We start with the given equation x = -2

Multiply both sides by some number. I'll pick 10

So if we multiply both sides by 10, we get

10*x = 10*(-2)

10x = -20

Now let's add something to both sides. Let's say we add 7 to both sides

10x+7 = -20+7

10x+7 = -13

Finally, let's divide both sides by 2

(10x+7)/2 = -13/2

You could keep going to add, subtract, multiply, or divide both sides by some number. This process can continue indefinitely. I'll stop here since we have three operations done.

-------------------

If we were to solve (10x+7)/2 = -13/2, we would get to x = -2

To solve (10x+7)/2 = -13/2, we follow the steps done in the previous section in reverse.

So we'll undo the "divide both sides by 2" operation by multiplying both sides by 2.

Then we'll undo the "add 7 to both sides" operation to subtract 7 from both sides

Lastly, we'll undo the "multiply both sides by 10" by dividing both sides by 10.

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Andrej [43]

Answer:

117

Step-by-step explanation:

since it's exactly 93.6%, it means it must be more than 100people as it can't be 93.6people/100people as a person cannot be less than 1. the lowest possible number of people therefore can only be 117/125people as when converted to a fraction, 93.6% = 93.6/100 but no decimals are allowed in fractions so 936/1000 and when reduced/simplified, we get 117/125 hence the answer is 117.

Topic: percentage-fraction conversion

If you like to venture further, feel free to check out my insta (learntionary). It would be best if you could give it a follow. I'll be constantly posting math tips and notes! Thanks!

5 0
3 years ago
Which property is not used to simplify the following expression? (X+2) times 5-7=5(x+2)-7
STatiana [176]

i think it is a i am not sure


7 0
3 years ago
Two products when calcium carbonate is heated
erik [133]

Answer:

When heated calcium carbonate forms calcium oxide and carbon dioxide.

7 0
3 years ago
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Find the product of the roots of the equation<br> xl-5x - 36 = 0
Marat540 [252]

Answer:

Step-by-step explanation:

Hello, I assume that you mean

x^2-5x-36

The product is -36.

x_1 \text{ and } x_2 \text{ are the two roots, we can write}\\\\(x-x_1)(x-x_2)=x^2-(x_1+x_2)x+x_1\cdot x_2

So in this example, it means that the sum is 5 and the product is -36.

Thank you

5 0
3 years ago
100 POINTS PLEASE HELP ASAP!!!! BTW I'm adding an attachment so dont answer until u see the question :)
nordsb [41]

\bf \cfrac{2}{5}\cdot \cfrac{3}{8}\implies \cfrac{\stackrel{1}{~~\begin{matrix} 2 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}{5}\cdot \cfrac{3}{\underset{4}{~~\begin{matrix} 8 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}\implies \cfrac{3}{20}

4 0
3 years ago
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