Mathematics
KimikoScherer
70

Help Solve this Simultaneous Equation! Step by step please

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(1) Answers
DannKingery874

1:       2x+y=3          5x-2y=12 2:      Multiply the first equation by 2          (2) (2x+y=3) => 4x+2y=6 3:      Add          4x+2y=6     +   5x-2y=12 ______________          9x=18               The y's cancel out          9x/9=18/9         The 9's cancel out          x=2 4:     Plug (x=2) back into either equation but, I'm going to do the first one. It's  easier.          2(2)+y=3              4+y=3           4-4+y=3-4         The 4's cancel out                 y=-1 Answer: (12,-1) If you plug (x) and (y) back in it will equal 3 for the first and 12 for the second.         

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