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