1 answer:
x^2-xy+3y^2=15 x-y=2
Make the equation X:
x = y + 2
Plug in and Solve:
(y+2)^2 - y(y+2) + 3(y+2)^2 = 15
y = (√46) - 7/3
y = - 7 + (√46)/3
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