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shtirl [24]
2 years ago
11

2x - y = 3 y = -x What’s the value of x?

Mathematics
2 answers:
pashok25 [27]2 years ago
6 0

Answer:

X = 1 which means Y = -1

Step-by-step explanation:

2x - y = 3                    

y = -x                              

Sub for y

2x + x = 3

Add the x's

3x = 3

Divided by 3

x = 1

zlopas [31]2 years ago
3 0

Answer:

These are simultaneous equations.They have to be solved like this:

2x-y=3 -y=3-2x 2x-3= -x

y= -x y= -(3-2x) 3x= 3

y=2x-3 x=1

Step-by-step explanation:

The value of x equals to 1

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Write the given phrase as an algebraic expression. Use the variable x to represent the unknown number.
Alchen [17]
Hello! I would love to help!

Let's start with this part of the equation: "the sum of a number and seven"

Alright. We know that x represents an unknown number. Do you see a part of the equation that could translate to "an unknown number?"

I see "a number." So let's fill X in for "a number.

Alright. So now we have "the sum of x and 7."

Next, let's remember that sum means adding. So we just need to 7 to x

X+7


So, now instead of "the sum of a number and 7" we have x+7.

Alright. Now we just have to do the "twice." When it is asking for "twice", it is asking us to multiply our answer by two. But we need to multiply both x and 7. The best way to do that is to put our "x+7" in parenthesis and put a two outside.

2(x+7)


That's your answer! 2(x+7)


Hope this helped! Comment if you have any questions!
5 0
3 years ago
If 55% people in a city like Cricket, 30% like Football and the remaining like nother games, then what per cent of the people li
labwork [276]

\large{\dag\:{\underline{\underline{\frak{\pmb{\red{Answer:-}}}}}}}

  • Cricket = 55%
  • Football = 30%
  • Other games = Remaining (?)

So, the percent of people who like <u>other games</u> equals:

= 100 – (55 + 30)

= 100 – 85

= 15%

<u>If </u><u>the </u><u>total </u><u>no.</u><u> </u><u>of.</u><u> </u><u>people</u><u> </u><u>is </u><u>6</u><u>0</u><u>,</u><u>0</u><u>0</u><u>,</u><u>0</u><u>0</u><u>0</u>:

★ Cricket

= 60,00,000 × 55/100

= 33,00,000

★ Football

= 60,00,000 × 30/100

= 18,00,000

★ Other sports

= 60,00,000 × 15/100

= 9,00,000

6 0
2 years ago
Tim has m dollars . Rebecca has $6 dollars less than 1 over 10 times the number of dollars that Tim has which expression represe
grin007 [14]

y= 1/10x - 6

Which if you plug in 70 for x, y equals 1.

Rebecca has $1 and Tim has $70, together they have $71.

8 0
3 years ago
.hdvehidvdjdvdidbdidvjdvdjdvdbdvjdhsbejebdbvdd
mezya [45]

Answer:

There’s no answer

Step-by-step explanation:

3 0
3 years ago
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What is f(3)?<br><br> –9<br> –1<br> 1<br> 9
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Think about this, f(x) -> f(3). Look at the chart, x is 3. What number is directly to the right of 3. Your answer is 9.
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3 years ago
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