book Maths Puzzle Numerical Ability

im using substitution in algera2 and i cant figure this one out

{4x - y = 22
{ 2x + 3y = 4

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book Other Question

what is the solution set of the inequality
5-|x+4|<-3?
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.