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Katen [24]
3 years ago
8

What is the value of x and what is the value of y in these equations (x in both has to be the same number, likewise for y)?

Mathematics
1 answer:
katrin2010 [14]3 years ago
7 0
To answer this, you should "subtract" x+y=7 from 3x+y=45.

What is left is 2x=38, where x then equals 19.

Plug this value into any of the equations (I will choose x+y=7 for simplicity).

19+y=7, y=-12

Check this answer by plugging it into the other equation.
3(19) + (-12) =45
45=45 so it is correct

X=19 and Y=-12
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Can someone help me out please ?
allsm [11]

Answer:

8 + x = 25 \\ x = 25 - 8 \\ 17

3 0
2 years ago
when the whole is the same why does it take 4 copies of one tenth to equal 2 copies of one fifth draw a model to support your an
bonufazy [111]
Well 4 copies of one tenth will equal 4 tenths. so when u simplify 4 over ten (4/10 )and divide the top and bottom by the common factor which is 2 then you will get 2 fifths  because 4 divided by 2 is 2 and 10 divided by 2 is 5.
7 0
4 years ago
Least to greatest 6.108, 6.6,6.1062,6.16
zmey [24]
6.1062, 6.108, 6.16, 6.6
3 0
3 years ago
A car used 16 gallons of gasoline and traveled a total distance of 460 miles. The car's fuel efficiency is 30 miles per gallon o
AURORKA [14]

Answer:

12 gallons

Step-by-step explanation:

Total gallons = 16 gallons

Total distance = 460 miles

Fuel efficiency in the highway = 30 miles per gallon

Fuel efficiency in the city = 25 miles per gallon

Let

h = gallons of gasoline were used on the highway.

460 = 30h + 25(16 - h)

460 = 30h + 400 - 25h

460 - 400 = 30h - 25h

60 = 5h

h = 60/5

h = 12 gallons

12 gallons of gasoline were used on the highway.

7 0
3 years ago
Stephanie goes shopping on Sunday. She
just olya [345]
Started with: $60
left with: $10
items bought: 20

60 - 10 = 50 < amount spent
  
50/20 = amount spent/items bought
           = $ 2.50 < each chocolate

you can check this by multiplying the items bought and the amount each item cost to get how much you spent

20 × 2.5 = 50

Stephanie started off with 60 dollars and ended with 10 dollars

60 - 50 = 10

hope this helps :)









4 0
3 years ago
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