book Maths Puzzle Numerical Ability

Use method to simplify each complex fraction

1. 12 / x -1 / 6 / x

2. 2/s - 3/t / 4t^2 - 9s^2 /st

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book Other Question

Solve the following system of equations for x, y, and z using any method:

x-y-z=3
3x-2y+2z=5
x+3y+z=5 whats the area of a sector in a circle if the circle has radius 4 cm and the arc has a measure of 120 degrees?