exam Maths Puzzle Numerical Ability

Solve for x

(x-5)/3 -3/2 =(4x+7)/6

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exam Other Question

A car CD player has an operating temperature of absoulte value of t-40 degrees < 80 degrees where t is the temperature in degreees Fahrenheit. Express this range without using abso 3x+3y+z=21
x-3y+2z=-5
8x-2y+3z=24