4x+2y=10 and 5x-3y=18 what does x equal

What is the x-coordinate of the solution of the system of equations?
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1 Answer

4x+2y=10 and 5x-3y=18

SUBRACT

  2(5x-3y =18) ~ 10x-6y=36

--

  3(4x+2y=10)~12x+6y=30

-----------------------------------------

                           -2x       =6

                             x= -3

SUBSTITUTE

4x+2y=10

4(-3) + 2y = 10

-12 + 2y =10

2y= 10+12

2y = 22

y =11

 

 

 

by Level 1 User (300 points)

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