exam Maths Puzzle Numerical Ability

how do you simplify (-3/2^3)^-2?

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exam Other Question

Solve the system of equation
5x+y=12
2x=3y-19 Solve the following systems by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.

x + 5y = 10
-2x - 10y = -20