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Nadya [2.5K]
3 years ago
15

10x-7x=12 how to solve this

Mathematics
2 answers:
djyliett [7]3 years ago
8 0

Answer:

x=4

Step-by-step explanation:

10x-7x=12

3x=12

divide both sides by 3

x=4

nekit [7.7K]3 years ago
5 0

Answer: x = 4

Step-by-step explanation: To solve this equation, we can first combine our like terms on the left side of the equation which are the x's.

10x - 7x = 3x so we now have the equation 3x = 12.

Now to solve for <em>x</em>, we want to get <em>x</em> by itself on the left side of the equation. Since <em>x</em> is being multiplied by 3, to get <em>x</em> by itself, we need to divide by 3 on the left side of the equation. Since we divided by 3 on the left side, we must also divide by 3 on the right side.

On the left side, notice that the 4's cancel out so we're simply left with <em>x</em>. On the right side we have 12 divided by 3 which is 4 so x = 4.

Finally, remember to check your answer by substituting a 4 back into the original equation.

So we have 10(4) - 7(4) = 12 or 40 - 28 = 12 or 12 = 12.

Since this a true statement, we know our answer is correct.

Remember to show all your work when solving equations.

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Find the value of the expression 2x2 - 4x2 + 7x – 7 if x= 3. What is the value if x = 2?
vichka [17]

Answer:

if x= 3, so it's 32  if x= 2, so it's 7

Step-by-step explanation:

5 0
3 years ago
A movie theater sells adults' tickets and children's tickets.
Yakvenalex [24]

Answer: $13.25 each ticket

Step-by-step explanation: 530 divided by 40

7 0
3 years ago
I theater sells tickets for a concert. Tickets for lower-level seats sell for $35 each and tickets for upper-level seats sell fo
lora16 [44]

Let X= the number of tickets sold at $35 each

Let 350 -X = the number of tickets sold at $25 each

The number of tickets sold for each type will be computed as follows:

X(35)+(350-X)25=10250

35X+8750-25X=10250

10X=10250-8750

X=1500/10

X=150 the number of tickets sold at $35 each

350-150 the number of tickets sold at $25 each

To recheck:

150(35)+200(25)

5250+5000

10250

7 0
3 years ago
50 points
Leya [2.2K]

Answer:

\frac{2}{4} inch

Step-by-step explanation:

Step 1

List the length of the wingspan of the five butterflies

\frac{1}{4}, \frac{1}{4}, 1, \frac{2}{4}, \frac{3}{4}

Step 2:

The two butterflies with the shortest wingspan has a wing length of \frac{1}{4} inches each.

Step 3:

Total length of the wingspan of the two butterflies with the shortest wingspan

= =\frac{1}{4} +\frac{1}{4} \\&#10;       = \frac{2}{4}

Final answer:

= \frac{2}{4} inch

5 0
2 years ago
A.) Write an exponential expression: choose a prime number between 2 and 10 to be the base, and an even between 0 and 10, to be
Slav-nsk [51]

Answer:

e_3^{4} will be the exponential expression.

Step-by-step explanation:

We have to choose a number between 0 ad 10 and has to be odd to be base say 3

And even number between 0 ad 10 to be exponent  say 4.

So the exponential expression will be : e_3^{4}

According to the information given above expression is the required expression.

4 0
3 years ago
Read 2 more answers
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