exam Maths Puzzle Numerical Ability

1-1/8z=z-3/4

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exam Other Question

If set A = {3,4,5,6,7} and set B = {1,2,3,4}:
(a) What is A (u shaped up i think it is called an union) B?
(b) What is A ( u shaped downward im not sure of what it is called) b Solve the following system of linear inequalities by graphing x-2y greater than or equal to 4 and x less than or equal to 4.