exam Maths Puzzle Numerical Ability

Can someone please help me solve this equation: √x-2 = 6√x^3-26. I would really appreciate it and thank you very much for taking the time to help me.

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exam Other Question

The demand and supply equations for a certain item are given by
D = -5p + 40
S = -p^2 + 30p - 8
Find the equilibrium price. Lauren wants to mix 5 liters of 7% milk with skim- milk(0%fat) to produce a mixture of 2 46/47% milk. How much skim-milk should Lauren add?