Whats the method of 2x+8y=12 x-2y=0

2x+8y=12, x-2y=0

x is 2 and y is 1

2 (2) + 8 (1) = 12

4 + 8 = 12: True

(2) - 2(1) = 0

2 - 2 = 0: True

for this it is probably the quadratic formula

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