book Maths Puzzle Numerical Ability

I am supposed to find the value of x and y and do not know where to start. Here is the problem:

x-4y+22
2x+5y=-21

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book Other Question

I am having trouble translating this word problem into an algebraic equation can you please help? thanks

Six more than twice a number is four times the difference between three and the number. What is the number?
(-3)+(-5)= the answers are...8,-2,-8,or 2 (thank you)