book Maths Puzzle Numerical Ability

please solve the following inequalities as i am having some difficulties:

4x + 12 >= 36 + 4

8z + 4z < 6z - 12

thank you :)

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book Other Question

I need to find the equations to answer two questions.

A speeding car is travelling at x km/h. A police car in pursuit of the speeder is travelling at y km/h where y>x. If the po please tell me the proof for this question that Complex numbers and real Numbers are same numbers( I mean if we show complex numbres with C and real numbers with R we have : C~R )