Question

7a-4b+ Sc - 7a+ 4b-5c
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Answer 1

4a-4b+Sc-7a+4b-5c

Agrupar terminos semejantes

=7a - 7a - 4b + Sc - 5c

Sumamos elementos similares: 7a - 7a = 0

= -4b + 4b + Sc - 5c

Sumar elementos similares: -4b + 4b = 0

= Sc  - 5c

:)