Question

Simplifique as expressões:
a) (2x - 2) - (x + 1) - (-3x -4)
b) 2.(3x + 4) + 5.(2x - 6)
c) (x - 7) + ( x + 7) + (-x + 8)

Answer 1

a) (2x - 2) - (x + 1) - (-3x -4)

2x-x+3x-2-1+4

4x+1

x= -1/4

b) 2.(3x + 4) + 5.(2x - 6)

6x + 8 + 10x -30

16x= 22

x=11/8

c) (x - 7) + ( x + 7) + (-x + 8)

x+x-x-7+7+8

x=-8