exam Maths Puzzle Numerical Ability

IF A ∪ B = A ∩ B then
A. A ≠ φ or B ≠ φ
B. A = A�
C. A ≠B D. A=B

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exam Other Question

3(x+2)+3(4-x) Graph 3x+2y=6
2y=-3x+6
y=-3x/2+6/2
y=3x/2+3
How would this be graphed? Would it be graphed with the line running through (2,0) and (3,0)?