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lianna [129]
3 years ago
5

If x + 2y = 8, and x - y = 5, what is the value of x?

Mathematics
1 answer:
klemol [59]3 years ago
4 0

Answer:

x = 6

Step-by-step explanation:

<em>Let's solve y for x + 2y = 8.</em>

x + 2y = 8

2y = -x + 8

y = -\frac{1}{2}x + 4.

<em>Let's solve y for x - y = 5.</em>

x - y = 5

y = x - 5

<em>Since both equations have been solved for y, we can combine them together into one!</em>

x - 5 = -\frac{1}{2}x + 4

x + \frac{1}{2}x = 4 + 5

1.5x = 9

x = 6

Hope this helped! If not, please let me know!

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There are 5 girls and 3 adults in Rileys field trip group.
Zanzabum

The group attended to the museum. They were 8 girls and 6 adults. So, we should calculate the total paid amount for the 6 adults, then calculate the paid amount for the 8 girls and then add up this two results.

The ticket for an adult costs $50. Since we have 6 adults, the amount paid for the adults' ticket was

50\text{ + 50 + 50 + 50 + 50 +50 = 6}\cdot50\text{ = 300}

So the adults' tickets costed 300. For the girls, one child ticket costs $30. So, the amount paid for the girls' tickets was

8\cdot\text{ 30 = 240}

So the total amount paid is 300+240 = 540.

6 0
1 year ago
X - 3(2x - 7) = 76<br> Help!
Zigmanuir [339]

Answer:

To solve this equation your goal is to get x by itself

First we need to distribute the 3 through the (2x-7)

x-6x+21=76 (-3*2x=-6x, -7*-3=21)

Your next step is to combine like terms

-5x+21=76 (x-6x=-5x)

Next subtract 21 from both sides

-5x=55 (21-21=0, 76-21=55)

Last you need to divide both sides by -5

x=-11 (-5/-5=1, 55/-5=-11)

x=-11

Hope this helps ;)

3 0
3 years ago
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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

Given

- 4( 3x - 5 ) > - 28

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7 0
2 years ago
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rodikova [14]

Answer:

53

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