Question

simplificar las siguientes expresiones


1) -(a -b -7)=
2) a - [ (2b -6) - (4c -1) ]=
3) c- [ (7a + 2 ) -5 -b ] =

Answer 1

1) -(a -b -7)=-a+b+7
2) a - [ (2b -6) - (4c -1) ]= a-(2b-6-4c+1)=a-2b+6+4c-1=a+2b+4c+5
3) c- [ (7a + 2 ) -5 -b ] = c-(7a+2-5-b)= c-7a-2+5+b=-7a+b+c+3