How do you simplify #2x+y-(9-4x)#?

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Answer 1 · 2015-11-03T15:07:15

#6x+y-9#
See explanation so that you can do others!

the minus in front of the bracket changes all the signs within the bracket to their opposite. So we end up with

#2x+y-(9-4x)" " ->" "2x+y-9+4x#
Now you group and work it all out

Grouping:

#(2x+4x) + (y) -(9)#

#6x+y-9#

Answer 2 · 2015-11-03T15:08:41

#=color(blue)(6x+y-9#

#2x+y-(9-4x)#

#=2x+y-9+4x#

#=2x+4x+y-9#

#=color(blue)(6x+y-9#