Question

REDUZA OS TERMOS SEMELHANTES : a) 30 - ( 16 - 5y ) + 12yb) 7m - [ t - ( 3m + 2t ) - 4 ] c) 8ab + 5b - 3a - [ 4ab + ( 9a - 6b ) - 12b ]

Answer 1

a)

30 - (16 - 5y) + 12y
30 - 16 + 5y + 12y
14 + 17y
=> 17y + 14

===
b)

7m - [ t - ( 3m + 2t ) - 4 ]

7m - [-3m - t - 4]
7m + 3m + t + 4
=> 10m + t + 4

===

c)

 8ab + 5b - 3a - [ 4ab + ( 9a - 6b ) - 12b ]

a(8b -3) + 5b - [a(4b + 9) - 18b]
a(8b - 3) + a - (a(4b + 9) - 23b)
=> a(4b -12) + 23b