exam Maths Puzzle Numerical Ability

I need help with this problem [x-8]+5>=11. I don't understand what I am supposed to do. Please show me step by step.

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exam Other Question

2log(x)=log(3x/4)-1 Casey is 4yrs old and Jordan is 13 yrs. old .....

When will Casey be twice as old as Jordan?

can anyone help please need this for tomorrow morning....thank you very much