Question: how do i solve coupled equations in maple?

hi everyone. i am a complete beginner to maple, have used it for about 1 hour in total.  could you take me through step by step how to solve coupled equations please. for example:

3x+5y+7x=25, 4x-2y-3z=15, x+y+z=0

to obtain solutions for x, y and z

any help is very appreciated. thank you

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