exam Maths Puzzle Numerical Ability

I am having trouble solving equations with logs this is the problem i am stuck on...

log x=4.5

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exam Other Question

One grocery clerk can stock a shelf in 30 minutes, wheras a second clerk requires 45 minutes to do the same job. If the two clerks worked together, how many minutes would it take to stock the shelf?
solve and graph the solution on a number line
2(-3x+2)<-3(4x-8) the < has a line underneth it