How do you solve #2x + 9= - 87- 10x#?

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Answer 1 · 2017-11-19T00:49:54

#x=-8#

#2x+9=-87-10x#

"plus 10x"

#=> 2x+9+10x=-87-10x+10x#
#=> 12x+9=-87+0x#
#=> 12x+9=-87#

"minus 9"

#=> 12x+9-9=-87-9#
#=> 12x+0=-96#
#=> 12x=-96#

"divided by 12"

#=> (12x)/12=(-96)/12#
#=> x=-8#