exam Maths Puzzle Numerical Ability

Solve for x: {(3^x9^x+20)/(27^2x+5)}=81^x+5

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exam Other Question

x+1/x+2+1/x / x/x+2=1/x^2 Determine whether the given number is a solution of the given equation.
1. 35; t+17= 53
2. 36; a-19= 17

Solve using the addition principle.
1. z+9=14