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Alexeev081 [22]
3 years ago
5

2x+2y=17 4x-y=25 What is the x value of the system of equations

Mathematics
2 answers:
Mrac [35]3 years ago
4 0
X=4.2
For the second equation, y=4x-25. Then you plug that into the first equation, which would form: 2x+2(4x-25)=17. Simplify. 2x+8x-25=17. 10x=42. x=4.2
umka2103 [35]3 years ago
4 0

Answer:

6.7 is the value of x.

Step-by-step explanation:

Given equations are

2x+2y=17     eq(1)

4x-y=25        eq(2)

from eq(2), we get

-y=25-4x

multiplying by -1 to above equation, we get

y=-25+4x

y=4x-25

subtitute above value of y in eq(1), we get

2x+2(4x-25)=17

2x+8x-50=17

add 50 on both sides of above equation, we get

2x+8x-50+50=17+50

2x+8x+0=17+50

2x+8x=17+50

add like terms

10x=67

dividing by 10 on both sides of above equation, we get

10x/10=67/10

x=67/10=6.7 which is the answer.

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What is the value of x
pashok25 [27]

Answer:

-10

Step-by-step explanation:

Generally, the algebraic expression should be any one of the forms such as addition, subtraction, multiplication and division. To find the value of x, bring the variable to the left side and bring all the remaining values to the right side. Simplify the values to find the result. Therefore, the value of x is -10.

8 0
3 years ago
The screen of Breonna‘s new phone is 2.85 centimeters long. What mixed number represents the length of the phone screen?
tatyana61 [14]
19/20 centimeters long
6 0
3 years ago
Need help with number 19!!!
zhannawk [14.2K]
2+2a           1x4a
------           ------      
   b                b

LOL, idk if this is right, but it is how i think it should be solved


7 0
3 years ago
When solved for c, the equation is c = k – 273.15 c = 273.15 – k c = k 273.15 c = 273.15k
charle [14.2K]

The the equation K = C + 273.15 when solved for c is C = K - 273.15

<h3>Change of subject of formula</h3>

K = C + 273.15

  • subtract 273.15 from both sides

K - 273.15 = C

Therefore,

C = K - 273.15

Complete question:

The temperature measured in Kelvin (K) is the temperature measured in Celsius (C) increased by 273.15. This can be modeled by the equation K = C + 273.15.

Learn more about equation:

brainly.com/question/13763238

#SPJ1

8 0
2 years ago
49 more than the quotient of an unknown number and 12 is 53. What is the value of the unknown number?
lara [203]
Unknown = x

the quotient of x and 12 is x/12 than 49 more than that is 53,
(x/12)+49=53, now use basic math and solve

-49 from both side,
x/12=4

*12 to both side,
x=48

therefore the unknown number is 48

4 0
3 years ago
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