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nataly862011 [7]
3 years ago
14

How to do this math exercise 4x-2y=60 4x-3y=26

Mathematics
2 answers:
igomit [66]3 years ago
3 0
4x -2y = 60
4x -3y = 26
(-) (+) (-)
__________
1y = 34
y = 34

To find x
4x -2y = 60
4x -(2)(34) = 60
4x -68 = 60
4x = 60 + 68
4x = 128
x = 32

Answer:
x=32 ; y=34
OLga [1]3 years ago
3 0

Answer:

Step-by-step explanation:

4x - 2y = 60

4x - 3y = 26.....multiply by -1

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

4x - 2y = 60

-4x + 3y = -26 (result of multiplying by -1)

-----------------------add

y = 34

4x - 2y = 60

4x - 2(34) = 60

4x - 68 = 60

4x = 60 + 68

4x = 128

x = 128/4

x = 32

check...

4x - 3y = 26

4(32) - 3(34) = 26

128 - 102 = 26

26 = 26 (correct)

so x = 32 and y = 34.....or (32,34)

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Tom has 5 comic books in his collections and receives 5 new comic books each month. Joe has 145 comic books, but sends 5 to each
Sindrei [870]

Answer:

In 7 Months both will have same number of comic books.

The both will have 40 comic books in 7 months.

Step-by-step explanation:

Let Number of months be x.

Given:

Tom Has number comic books = 5

Each month he receives number of books = 5

Total Number of books he has after x month can be calculated by sum of number of comic books he has + number of comic books he receives multiplied by number of months

Hence Total Number of books he has after x month = 5+5x

Also Given:

Joe Has number comic books = 145

Each month he send number of books to 1 friend = 5

Number of friends = 3

Hence books send to friend each month = 5\times3 =15

Total Number of books he has after x month can be calculated by Difference of number of comic books he has and number of comic books he send to friends multiplied by number of months

Hence Total Number of books he has after x month = 145-15x

We need to find the number of months in which both will have same number of of comic book.

Hence we can find by making both equation equal we get;

5+5x=145-15x

Combining same terms we get;

5x+15x=145-5\\20x =140\\x=\frac{140}{20}=7 \ months

Hence the will have same number of comic books after 7 months.

Now we need to find the number of books the both had after 7 months:

Tom has = 5+5x=5+5\times7= 5+35=40\ books

Joe has = 145 - 15x = 145 - 15\times7 = 145-105 = 40 \ books

Hence they both will have 40 comic books after 7 months.

4 0
2 years ago
Help please best answer
Anni [7]

Hey!

Hope this helps...

~~~~~~~~~~~~~~~~~~~~~~~~~

When looking at this graph we see 2 things:

(1) How they made the graph, looks awful, anyway...

(2) They practically give you the answer...

When finding an answer to a question like this, you want to use a formula (like this):

A = t * p  (where A is the amount of people, t is total amount of people, and p is percent of people / 100)...

So... we fill in the givens...

We know t = 400, and (by looking at the graph) we see that p is around 0.10 and 0.15.  So for our sake we'll make p = 0.13 (about halfway)...

A = 400 * 0.13

A ~ 52

The answer is: About 52 people bought 20 items...

And because we got 52, and 52 is close to 54...

<em>The Answer: B.) 54</em>

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