What is x? 1/2(180-x) + (90-x) = 120

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Answer 1 · 2018-05-11T01:34:54

#x = 40#

#=> 1/2(180 - x) + (90 - x) = 120#

#=> 180/2 - x/2 + 90 - x = 120#

#=> 90 - x/2 + 90 - x = 120#

#=> 90 + 90 - x - x/2 = 120#

#=> 180 - (3x)/2 = 120#

#=> (3x)/2 = 180 - 120#

#=> (3x)/2 = 60#

#=> x = 2/3 × 60#

#=> 40#