-x - 2y = -1 \Rightarrow x = 1 - 2y
Related Articles
- = \langle 3y + z, -3x + 2z, -x - 2y \rangle
- -3x + 2z = 5 \quad \text{(2)}\\
- -x - 2y = -1 \quad \text{(3)}
- -3(1 - 2y) + 2z = 5 \Rightarrow -3 + 6y + 2z = 5 \Rightarrow 6y + 2z = 8 \Rightarrow 3y + z = 4
- = \cos^2 x + 2\cos x \sec x + \sec^2 x + \sin^2 x + 2\sin x \csc x + \csc^2 x
- = 1 + 2(1) + \sec^2 x + 2(1) + \csc^2 x = 1 + 2 + 2 + \sec^2 x + \csc^2 x = 5 + \sec^2 x + \csc^2 x
