Solve for b
b=13.75
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18=4.25+b
Multiply 0.25 and 17 to get 4.25.
4.25+b=18
Swap sides so that all variable terms are on the left hand side.
b=18-4.25
Subtract 4.25 from both sides.
b=13.75
Subtract 4.25 from 18 to get 13.75.
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