Question if-is-

1.4 Systems of Two Linear Equations - Substitution method
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Equation 1: 7 x minus 5 y, equals 4. Equation 2: 4 x minus 8 y, equals 9.

If the ordered pair x comma y is the solution to the system of equations above, what is the value of 3 x plus 3 y ?

A.

negative 13

B.

negative 5

C.

5

D.

13