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halTombembrindradl
halTombembrindradl halTombembrindradl
  • 05-09-2016
  • Mathematics
Answered

3x + y = 4

2x + y = 4


(Points : 4)

A(1, 7)

B(0, 4)

C(3, 12)

D(3, 13)

Verified Answer :

nobillionaireNobley
nobillionaireNobley nobillionaireNobley
  • 05-09-2016

3x + y = 4 . . . . . (1)
2x + y = 4 . . . . . (2)

From (1), y = 4 - 3x . . . (3)
from (2), y = 4 - 2x . . . . (4)

Equating (3) and (4), we have
4 - 3x = 4 - 2x
-2x + 3x = 0
x = 0

From (1), 3(0) + y = 4 => y = 4

Therefore, solution is (0, 4)

Answer Link

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