book Maths Puzzle Numerical Ability

Please help me solve this problem 5/4x+1/8x=3/8+x (x= )

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Express as a single logarithm and simplify:
logx+logy-logz-logw
how do I do this one?
I am in an advanced algebra 2 class, and i am having a lot of problems understanding one-variable equations and inequalities. Can you please explain it thoroughly for me and add so