Question

Reduza os termos semelhantes
c) 7x-z-3x+5z-4x

Answer 1

7x-z-3x+5z-4x=0


os semelhantes
7x-3x-4x=7x-7x=0

-z+5z=4z

Então

7x-z-3x+5z-4x
7x-3x-4x-z+4z
0+4z=0
4z=0

Answer 2

7x+3x-4x+5z-z (igualar os termos)6x-4z