How do you solve #-x-9=-3x+8+x#?

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Answer 1 · 2017-12-03T16:12:06

#x=17#

Simplify both sides first.

#-x-9=-3x+8+x#

#-x-9 =-2x+8#

Add #2x and 9# to both sides
This has the effect of moving all the #x# terms to one side and all the number terms to the other.

#-x-9color(blue)(+2x+9) = -2x+8 color(blue)(+2x+9)#

#-xcancel(-9)color(blue)(+2xcancel(+9)) = cancel(-2x)+8 color(blue)(cancel(+2x)+9)#

#x= 17#