(x+y)³+4(X+y)²+4x+4y
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answer is Solve equation [2] for the variable x [2] 4x = 4y + 12 [2] x = y + 3. // Plug this in for variable x in equation [1] [1] 3•(y +3) + 4y = 2 [1] 7y = -7. // Solve equation [1] for the ...
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