How do you evaluate the following algebraic expression at b=-1 and simplify your answer #-3(b-1)-4(b-3)#?

1 Answer
Feb 13, 2017

Answer:

See the entire solution process below:

Explanation:

To evaluate this expression to #b = -1# we need to substitute #color(red)(-1)# for every occurrence of #color(red)(b)# in the expression and then calculate the result to simplify the answer:

#-3(color(red)(b) - 1) - 4(color(red)(b) - 3)# becomes:

#-3(color(red)(-1) - 1) - 4(color(red)(-1) - 3)#

#(-3 xx -2) - (4 xx -4)#

#6 - (-16)#

#6 + 16#

#22#