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Marrrta [24]
3 years ago
9

X + 4y = 7 4x – 3y = 9

Mathematics
2 answers:
NikAS [45]3 years ago
5 0

Answer

<u>{3,1} </u>

Explaination

3 +4=7[1]    x = -4y + 7

// Plug this in for variable  x  in equation [2]

  [2]    4•(-4y+7) - 3y = 9

  [2]     - 19y = -19

// Solve equation [2] for the variable  y

  [2]    19y = 19

  [2]    y = 1

// By now we know this much :

   x = -4y+7

   y = 1

// Use the  y  value to solve for  x

   x = -4(1)+7 = 3

Solution :

{x,y} = {3,1}

               

WINSTONCH [101]3 years ago
5 0
274/484884 /378383/3738
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