Solve for b
b = -\frac{11}{4} = -2\frac{3}{4} = -2.75
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-\frac{1}{4}+b=-3
Swap sides so that all variable terms are on the left hand side.
b=-3+\frac{1}{4}
Add \frac{1}{4} to both sides.
b=-\frac{12}{4}+\frac{1}{4}
Convert -3 to fraction -\frac{12}{4}.
b=\frac{-12+1}{4}
Since -\frac{12}{4} and \frac{1}{4} have the same denominator, add them by adding their numerators.
b=-\frac{11}{4}
Add -12 and 1 to get -11.
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