Write 3y = 9 as an equation in two variables : *
x + 3y -9 =0
2x +3y -9 =0
x - 3y + 9 = 0
0.x + 3y - 9 = 0
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Answer:
x+9-9=0
x=0
2x+9-9=0
2x=0
x=0
x-3y+9=0
x-9+9=0
x=0
0+9-9=0
=0
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