Solve the following system of equations. Enter the y-coordinate of the solution. Round your answer to the nearest tenth.

5x+2y=21
-2x+6y=-34

Question

Solve the following system of equations. Enter the y-coordinate of the solution. Round your answer to the nearest tenth. 

5x+2y=21
-2x+6y=-34

directrix · Answer

5x+2y=21  -->   Multiply each term of the first equation by (-3)
 -2x+6y=-34

directrix · Answer

-15x -6y = -63
  -2x +6y  =-34                                Add like terms. The two y terms should add to zero.
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directrix · Answer

Then, solve for x and post what you get. Okay? @kimmykaht

anonymous · Answer

I got -5.70 @Directrix , so would the answer be -6?

anonymous · Answer

Math is really hard for me :(

directrix · Answer

For y, I got -64/17. Let me see what that is as a decimal to the nearest tenth.

anonymous · Answer

is it -3.8?

directrix · Answer

-15x -6y = -63
 -2x +6y =-34 
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-17x = - 97
      x  =  97/17   but the question is to find y.

directrix · Answer

y = - 3.8, yes, that is correct.

anonymous · Answer

thank you!! @Directrix

directrix · Answer

You are welcome.