exam Maths Puzzle Numerical Ability

i think this is what i'm doing??? but i really need help!!!

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exam Other Question

Could someone be so kind in helping me with this problem?

I need to solve the following systems by substitution:

4x - 12y = 5
-x + 3y = -1

Thanks so much,
Ashley I have been struggling with this math problem and I was wondering if someone could help me? I would deeply appreciate it!! Please and Thank you!!

Using Several Methods of Factoring
Factor completely
x^2-2x-4y^2-4y