Respuesta:
1.-4a-3b+c+a-5b-c=
5a-8b
2.-3a+a+7b-4c-a-5b+3c-b+d=
3a+b-c+d
3.-7x-5y-12z+2x+3x-2y-x-y-z=
11x -8y-13z
4.-7x-13y-4z-(7x-(-y+z-4x+9y-z-3z))=
7x+13y-4z-(7x-8y+4x-3z)=
7x+13y-4z-11x+8y-3z=
-4x+21y-7z
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Verified answer
Respuesta:
1.-4a-3b+c+a-5b-c=
5a-8b
2.-3a+a+7b-4c-a-5b+3c-b+d=
3a+b-c+d
3.-7x-5y-12z+2x+3x-2y-x-y-z=
11x -8y-13z
4.-7x-13y-4z-(7x-(-y+z-4x+9y-z-3z))=
7x+13y-4z-(7x-8y+4x-3z)=
7x+13y-4z-11x+8y-3z=
-4x+21y-7z