Finding equilibria of nonlinear coupled differential equations requires solving nonlinear simultaneous equations that can have any number

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Finding equilibria of nonlinear coupled differential equations requires solving nonlinear simultaneous equations that can have any number of solutions. For each of the following pairs, solve each equation for y in terms of x, set the two equations for x equal, and solve for x. Check that both equations give the same value for y. Sketch a graph with y on the vertical axis.
-5 - y + 3x2 + 2x = 0
-2 + 2y - 4x = 0
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