exam Maths Puzzle Numerical Ability

Does the line below pass through the point (2, -1)?

3x - 2y = 8

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exam Other Question

Simplify: 3/4/4/5
Possible Answers:
A. 16/15
B. 15/16
C. 5/3
D. 3/5
I am coming up with 3/80, since that is not one of the possible answers then I think I need some assistance.
Thanks hi can u help me with this problem...

[1 1/2 4 5 [-2 -4 7/8 11/2

2 3/5 8 9] + 3 2 -1 -10/11]