exam Maths Puzzle Numerical Ability

1) 1/A=1/M+1/T solve for T
I thought my LCD was AMT but its still not coming out right.
If someone could help thanks.

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exam Other Question

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C./ .D
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A. / .B
If the shape doesnt come out it is a Is the ordered pair (1,2) a solution of the equation 4x - y = 6?

my answer is 2 = 6 (false statement)