3 years ago

Solve using substitution method. 3×-4y=18 and 2x + y = 1

1 answer:

3 0

3x - 4y = 18 ⇒ 3x - 4y = 18
2x + y =   1 ⇒ 8x + 4y =   4
      11x = 22
   11    11
      x = 2
      2x + y = 1
   2(2) + y = 1
   4 + y = 1
   - 4 - 4
   y = -3
      (x, y) = (2, 3)

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