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alexdok [17]
3 years ago
6

How to solve x-2y=1 for y

Mathematics
1 answer:
vazorg [7]3 years ago
5 0
To begin to isolate y, perform the opposite operation and subtract x on both sides of the equation

-2y = -x -1

Perform the opposite operation by dividing both sides of the equation by -2

y=- \frac{1}{2} x+ \frac{1}{2}
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Step-by-step explanation:

Supplementary angles.=180°

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Yes that is correctmark as beain


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A. y ≤ 3x +2
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Put -31 0 -12 -4 and -42 in increasing order<br><br> I need help
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4 0
4 years ago
Solve each system by elimination. Check the solution in both of the original equations.
elena55 [62]

Answer:

After finding the solution of given equations by elimination method

-3x-3y=12

-9x+3y=-24

we get the value of x=1 and y= -5

Step-by-step explanation:

-3x-3y=12 is eq A

-9x+3y= -24 is eq B

To find out value of x and y we will use elimination method

To find value of x add eq A and eq B

(-3x-3y)+ (-9x+3y)= 12 + (-24)\\-3x-3y-9x+3y= 12-24\\-12x = -12\\dividing \,\,by -12\,\,on\,\, both\,\,sides\\\frac{-12x}{-12} = \frac{-12}{-12} \\x= 1

Now to find value of y put x=1 in eq A

(-3 \times 1 )- 3 y=12\\-3 -3y =12\\\\adding\,\,3\,\,on\,\, both\,\,sides\\-3y=12+3\\\\dividing\,\,-3\,\,on\,\,both\,\,sides\\y= \frac{15}{-3} \\y= -5

so the value of

x= 1

and

y= -5

For checking the solution

putting value of x and y in eq A

-3x-3y=12\\-3(1)-3 (-5)=12\\-3+15=12\\12=12\\

Hence proved

Putiing value of x and y in eq B

-9x+3y=  -24\\-9(1) + 3 (-5) = -24\\-9 -15 = -24\\-24= -24\\

Hence proved

Keywords: Solving Linear System

  • Learn more about Solving Linear System at: brainly.com/question/9045597
  • brainly.com/question/3739260
  • brainly.com/question/13168205

#learnwithBrainly

6 0
4 years ago
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