Question

reduce los terminos semejantes resolviendo previamente los parentesis cuando corresponda 9x + 13 y - 9z - 7x - { -y + 2z - ( 5x - 9y + 5z) - 3z } =

Answer 1

9X + 13 - Y - 9Z - [7X - { -Y + 2Z - (5X - 9Y + 5X) - 3Z}]

Empezamos de adentro hacia afuera:

- (5X - 9Y + 5X) = - (10X - 9Y) = -10X + 9Y

- { -Y + 2Z - 10X + 9Y - 3Z}

- { -10X  + 8Y - Z} = 10X - 8Y + Z

-[7X + 10X - 8Y + Z] = -[17X - 8Y + Z] = -17X + 8Y - Z

9X + 13Y - 9Z -17X + 8Y - Z = -8X + 21Y - 10Z

9X + 13 - Y - 9Z - [7X - { -Y + 2Z - (5X - 9Y + 5X) - 3Z}] = -8X + 21Y - 10Z