Answer:
B one solution
Explanation:
3x + 1/3y=12
2y=18x+72; y = 18x/2 +72/2; y =9x+36
multiply all through by 3
9x + y = 36
9x + 9x+36 = 36
18x =36-36= 0
x= 0/18 = 0
y =9x+36
y = 9(0) +36 = 0+36= 36
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