exam Maths Puzzle Numerical Ability

solve the equation for x.
please display steps.

4^(2x)-20X4^(x)+64=0

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exam Other Question

Solve and check the linear equation.

-6x-1-3(x+1)=7x-5 First of all would like to thank you for you help,I would like to know is this consider a complex equation or number and how would i solved it algebraically,
5-2/x-6=10-2x/x-6..