exam Maths Puzzle Numerical Ability

(3,7) x+2y=6

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exam Other Question

I have to do the following problem and have no clue where to start. lease Help!!! Evaluate the following expression if x = 1.07, y= -4.12 and z = -3.76. Round your answer to the nearest tenth.
z2(2is an exponent)/ xy
96/x^2-36 - 8/x-6 = 9/x+6