Question

Alguem me ajuda?conteudo de 8 ano (conta completa) 30 pontos

1-Efetue as operaçoes:

a 5z+(4x+2z-7t)=

b 9y-(3y-7)=

c (x+2y)+(9x-2y)=

d -(x+2y+4t)-(-5x-8y+5t)=

e -9x-3y+4z+2t-5x-7y+2z-6t=

Answer 1

Resposta:

a 5z+(4x+2z-7t)=7z+4x-7t

b 9y-(3y-7)=6y+7

c (x+2y)+(9x-2y)=10x

d -(x+2y+4t)-(-5x-8y+5t)= 4x+6y-9t

e -9x-3y+4z+2t-5x-7y+2z-6t=-14x-10y+6z-4t