Question

se A=x+2x;B=5x-4 e C=7-8x, resolva as expressões indicada por

A) a+b

B) c-a

C) b-c

D) a+b+c​

Answer 1

A=x+2x

B=5x-4

C=7-8x

A) a+b =

(x+2x)+2(5x-4)

x+2x+10x-8

13x-8

B) c-a =

(7-8x)-(x+2x)

7-8x-x-2x

-11x+7

C) b-c =

(5x-5)-(7-8x)

5x-5-7+8x

5x+8x-5-7

13x-12

D) a+b+cc

x+2x+5x-4+7-8x

+3

Boa Semana ❤️❤️

26/09