exam Maths Puzzle Numerical Ability

2zx2power y=18 wherex=1,z=y

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exam Other Question

The difference of the two numbers is 11. The second is 8 less than 2 times the first. What are the two numbers? 5x+5-4x_<14
Help be with this please.Of course the _ is supposed to be under the <
Solve using the addition and multiplication principles. Help please I dont no where to start.