Input:
pdsolve(ds(y,t)-ds(y,x)=2z-2y,ds(z,t)-ds(z,x)=4z-4y)
Write:
`pdsolve(ds(y,t)-ds(y,x)=2z-2y,ds(z,t)-ds(z,x)=4z-4y)`
Compute:
$$pdsolve(\frac{dy}{dt} -\frac{dy}{dx} =(-2)\ y+2\ z,\frac{dz}{dt} -\frac{dz}{dx} =(-4)\ y+4\ z)$$
Output:
$$pdsolve(\frac{dy}{dt} -\frac{dy}{dx} =(-2)\ y+2\ z,\frac{dz}{dt} -\frac{dz}{dx} =(-4)\ y+4\ z)== y=\frac{1}{8}\ ((-8)\ c_1+2\ (C_1\ exp(2\ t)+C_1\ exp((-2.0)\ x)))\ and\ z=\frac{1}{2}\ ((-2)\ c_1+C_1\ exp(2\ t)+C_1\ exp((-2.0)\ x))$$
Result: $$y=\frac{1}{8}\ ((-8)\ c_1+2\ (C_1\ exp(2\ t)+C_1\ exp((-2.0)\ x)))\ and\ z=\frac{1}{2}\ ((-2)\ c_1+C_1\ exp(2\ t)+C_1\ exp((-2.0)\ x))$$
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