solve
x'=x
y'=-4x+2y
First equation is variable seperable. So we can easily get solution of this equation.
After puting value of x in second equation, it becomes linear differential equation in variable y. So find integrating factor . And now you can get solution of this equation easily.
So, solutions are:
x = c1et
y = 4c1et + c2e2t
where c1 and c2 are constants and x and y are functions of variable t. (Assumed)
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