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irina1246 [14]
3 years ago
6

Solve for x: x = 2 x = 5 x = 9 x = 13 MAX PTS AND BRAINLIEST

Mathematics
2 answers:
aalyn [17]3 years ago
6 0

Use the substitution method from using the mutiple choices.

The two numbers must equal to each other.

x= 2

(2+50)/2= 13(2)

add first then divide

(52)/2= 13(2)

26= 26

Answer: x= 2

kodGreya [7K]3 years ago
3 0

(x+50)/2 = 13x

First multiply both sides by 2 to remove the fraction:

x +50 = 26x

Subtract 1x from each side:

50 = 25x

Divide both sides by 25:

x = 50/25

x = 2

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Which method is used in elimination to find the solutions of x + 3y = 9 and x - 3y = 8?
weqwewe [10]

Answer:

x=17/2  y=1/6

Step-by-step explanation:

-1(x+3y=9)

1(x-3y=8)

_________

-x-3y=-9

x-3y=8

________

-6y/6=-1/6   y=1/6

x+3(1/6)=9

x+ 1/2=9

   - 1/2  - 1/2

x=17/2

4 0
3 years ago
(PLEASE ANSWER + BRAINLIEST!!)
Licemer1 [7]
The answer is x=20.  Hope this helps.
8 0
3 years ago
Twice a number decreased by seven is equal to 43
goblinko [34]

2x-7=43

2x=50

x=25

I hope I helped you with your solution! If you could give me brainliest, I would be very thankful!

4 0
3 years ago
Read 2 more answers
ramon ate at a restaurant and gave the server a $4 tip the tip was 20% of the cost of the meal how much was the meal
Tomtit [17]

Answer:

The meal was $20

Step-by-step explanation:

20%= 1/5

1/5=4/? ---> one converts to four by multiplying it by 4 so you should do the the same with the denominator which is five.

5×4= 20

5 0
2 years ago
The first three terms of an arithmetic progression are m,12 and n . Find the value of m+n​
Vera_Pavlovna [14]
<h3>Answer:  24</h3>

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

Explanation:

There are a few approaches. Here's one way to solve.

Let d be the common difference between the terms.

We add d to each term of this arithmetic sequence to get the next term.

  • First term = m
  • Second term = 12 = m+d
  • Third term = n = (m+d)+d = m+2d

Focusing on the second equation, we can solve for d like so

m+d = 12

d = 12-m

This is then plugged into the third equation

n = m+2d

n = m+2(12-m)

n = m+24-2m

n = 24-m

Therefore,

m+n = m+(24-m) = 24

It turns out that it doesn't matter what m and n are because m+n is always equal to 24 in this case.

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

A more concrete example:

Let's say m = 2. We won't set up n just yet but we'll be able to compute it fairly soon.

Since m = 2, this means d = 12-m = 12-2 = 10. This is the gap between adjacent or neighboring terms.

If d = 10, then the third term must be n = 12+d = 12+10 = 22

We can then see that m+n = 2+22 = 24

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

I'll do another example:

m = 5

d = 12-m = 12-5 = 7

n = 12+d = 7 = 19

m+n = 5+19 = 24

Whenever in doubt, or if you get stuck, it helps to come up with actual numeric values to hopefully clear things up.

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

An alternative way to get the answer:

Let's try to determine what m+n is actually saying. We have 12 right in the middle of the first term (m) and third term (n). Because the gap between the numbers is the same (that being d), we know that 12 is the midpoint of m and n. It might help to draw out a number line to see what's going on.

The midpoint of m and n is (m+n)/2

Set this equal to 12 and isolate the "m+n"

(firstTerm+thirdTerm)/2 = second term

(m+n)/2 = 12

m+n = 2*12

m+n = 24

So in general, if the first three terms of the arithmetic sequence are m, k, n, then m+n = 2k.

3 0
3 years ago
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