Respuesta :

x=3
9x-18=3x
9x-3x=18
6x=18
x=18/6
x=3

since x=3
9(3)-18
27-18
JM=9
9x-18=3x
9x-3x=18
6x=18
x=3

thus, the answer is a.

JM = 9x-18
substitute 3 = x into 9x -18
9(3)-18
=27-18
=9

the answer is b