SOLUTION: 16+8r-4r+4=24 step by step?

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Question 328872: 16+8r-4r+4=24
step by step?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
16%2B8r-4r%2B4=24
%288r-4r%29%2B%2816%2B4%29=24<--- Gather like terms, then simplify
4r%2B20=24
4r%2B20-20=24-20<--- Subtract 20 from both sides.
4r=4
%284r%29%2F4=4%2F4<--- Divide both sides by 4.
%284%2F4%29r=1<--- Simplify
r=1