exam Maths Puzzle Numerical Ability

I am confused on how to do page 539 #11

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Solve the given triginometric equations analytically and by use of a graphing calulator. Compare results. Use values of x for 0 less then or equal to x less then 2pi

sin 4x - co how do u solve x in Equations with Fractions? the problem is x-3 over 5+2=x+4 over 6