How do you solve #-31 + 8x= -5x +3(x+3)#?

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Answer 1 · 2016-02-22T09:51:45

#x=4#

#-31+8x=-5x+3(x+3)#

Expand #3(x+3)# to #3x+9#.

#-31+8x=-5x+3x+9#

Add #31# to both sides.

#8x=-5x+3x+9+31#

Simplify.

#8x=-5x+3x+40#

Combine #-5x+3x# to #-2x#

#8x=-2x+40#

Add #2x# to both sides.

#2x+8x=40#

Simplify.

#10x=40#

Divide both sides by #10#.

#x=40/10#

Simplify.

#x=4#