Answer:
Crate weight = x, bricks weight =y
X+20y=167 - - - - - (1)
X+32y=191 - - - - - -(2)
Subtract 1 and 2
0-12y=-24
Then y=2 pounds
Substitute y in equation 1
X+40=167
Then x=127 pounds
Then when we have 19 bricks the weight will be
127+ 19*2= 165 pounds