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# Linear Equations Example

LINALG-ZBEH1E

Which of the following is a linear equation?

A

$$\sin^2(x)+\cos^2(x)=1$$

B

$$x^2+2x+1=0$$

C

$$x+3y=2$$

D

$$e^x + e^{-x} = 2$$

E

$$x + 3y^2 = 1$$