What is x?

Question

(x-12)+2x=90

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Answer 1 · 2018-02-17T17:49:57

#x=34#

#(x-12)+2x=90#
Opening the bracket,
# x-12+2x=90#
#3x-12=90#
#3x=90+12#
#3x=102#
#x=102/3#
#x=34#

Answer 2 · 2018-02-17T17:56:02

#x = 34#

#x - 12 + 2x = 90#

combine the #x# terms
#3x -12 = 90#

add 12 to both sides
#3x = 102#

divide both sides by #3#
#x = 34#