Resposta :
Resposta:
a) 5a + (3a - 2) - (10a -8)
5a+3a-10a+8-2
-2a+6
b) 6x + (5x - 7) - (20 + 3x)
6x+5x-3x-7-20
8x-27
c) (x+y+z) + (3y + z)
x+4y+2z
Resposta:
a) 5a + (3a - 2) - (10a -8)
5a+3a-10a+8-2
-2a+6
b) 6x + (5x - 7) - (20 + 3x)
6x+5x-3x-7-20
8x-27
c) (x+y+z) + (3y + z)
x+4y+2z