How do you solve #-13= - \sqrt { 4+ 7m } + 3#?

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Answer 1 · 2017-11-18T18:00:55

#=> m = 36#

#-13= - \sqrt { 4+ 7m } + 3#

#=> -13 -3 = - sqrt(4+7m)#

#=> -16 = -sqrt(4+7m)#

#=> 16 = (4+7m)^(1/2)#

Square both sides:

#=> 16^2 = 4+7m#

#=> 256 = 4 + 7m#

#=> 7m = 256-4= 252#

#=> m = 252/7#

#=> m = 36#