How do you solve #-18=-3r+24#?

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Answer 1 · 2018-04-29T10:54:40

#r = 14 #

Plus #3r# to both sides:

#3r - 18 = cancel(-3r) + 24 + cancel(3r #

#=> 3r - 18 = 24 #

Plus 18 to both sides:

#=> 3r = 24+18 = 42 #

Divide by 3 on both sides

#=> r = 42/3 = 14 #