jhene01 jhene01
  • 23-03-2016
  • Mathematics
contestada

Solve, using the substitution method.

y – 3x = 7
21 + 9x = 3y

A.
There is no solution.
B.
There are an infinite number of solutions.

C.
The solution is (1, 10)

D.
The solution is (28, 0)

Respuesta :

HarborMaster
HarborMaster HarborMaster
  • 23-03-2016
y – 3x = 7
y -3x +3x = 7+3x
y = 7+3x

21 + 9x = 3y
21 + 9x = 3(7+3x)
21 + 9x = 21 + 9x

The answer is  B.There are an infinite number of solutions.



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