exam Maths Puzzle Numerical Ability

Can you please help me solve this: Solve these equations for whatever variable they contain. Be sure to find all the values of the variable that make the equation true.
z^2 - 14z + 2 = 2 - 11z

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exam Other Question
what am i doing wrong?
¼ = 3 - (2x-1)/(x+2)
¼ * 4(x+2) = 3 - {(2x-1)/(x+2)} *4(x+2)
x + 2 = 3 - (2x - 1)4
x + 2 = 3 - (8x - 4)
x + 2 = 7 - 8x
x + 2 - 2 = 7 - 2 - 8x
x +8x = 7 - 8x +8x
9x = 7
9x/9 = 7/9
x = 7/9 Hi!
Please help me, with this question, the problem says:
Evaluate each of the following if a=3 and b=4
(a-b)^3
Please and Thank You=)