It seems he meant the numbers after the x to be exponents. Move 7 over to the left side, you have

-7*x0 + 2*x1 + 3*x2 - 7*x3 + 0*x4 +7*x5 = 0

In reply to Re^2: solving system of equations with complex expressions by ForgotPasswordAgain
in thread solving system of equations with complex expressions by Anonymous Monk

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