book Maths Puzzle Numerical Ability

the question i am having problem with is: 5x-y=10, what is the value of x. can you please help me with this problem.

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Mr. Jones is 4 years older than his wife and 31 years older than his son. their ages add up to a total of 82 years. Find how old Mr. Jones is and the ages of his wife and son. Solve these rational inequalities. State and graph the solution set.
x/x+2 > -1

I just can't figure this one out, I am supposed to graph this on a sign graph. It just isn't mak