exam Maths Puzzle Numerical Ability

Solve algebraically using one variable. Find three consecutive even integers such that the product of the smallest integer and the middle integer is eight less than eleven times the largest integer. Thanks for the help.

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exam Other Question

There is a similar problem on the board already, but this one does not solve the same way, please help.

Find the solution of the equation, correct to six decimal places:

5^2x
Please show me how to solve the equation and check the answer. Thanks!

0.05(z+20)=0.1z-0.5