book Maths Puzzle Numerical Ability

square root of 3x-12 x=4

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book Other Question

Can someon help me simplify a complex fraction??

(1/x+2/y)/(4/xy)
Solve the system by elimination. If the system is inconsistent or has dependent equations, say so.

-7x + 5y = -20

-3x - 2y = 8