exam Maths Puzzle Numerical Ability

Which ordered pair is a solution to 3x-4y=-1?

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exam Other Question

The directions are solve this with exact solutions

6^x+1=(1/36^x)

This is how I started. THANKS!!
6^x+1=(6^2)^x+1 3. 2^r+1= 4r

4. 3^2x = 27^x+1

5. 5^x-1 = 1/125