Answer:
x = 1
y = -4
Step-by-step explanation:
if you solve for y
y = -4x
plug this into the other equation
x - -4x = 5
simplify
5x = 5
x = 1
plug x into the fist equation
4(1)+y = 0
y = -4
LCF of that would be: 280081005600
GCF of that would be: 2400
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