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posted by Maddy Monday, November 3, 2008 at 3:00pm.

Need help in solving 0.5b+3.4=0.2b+12.4

subtract .2b from both sides. 0.3b + 3.4 = 12.4 subtract 3.4 from both sides 0.3b = 9.0 divide both sides by 0.3 b= 30

b=30

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