Question 1022966
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how do i solve this equation?
2x^2 + y^2 =9
3x+6 = 4y-4x
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<pre>
{{{2x^2 + y^2}}} = {{{9}}},      (1)
{{{3x + 6}}} = {{{4y - 4x}}}.   (2)

Express y = {{{(7x+6)/4}}} from (2) and substitute it into (1). You will get a single equation for unknown x. 
Then simplify and solve it.
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