Solve for u
u\geq 4
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1-u\leq -3
Swap sides so that all variable terms are on the left hand side. This changes the sign direction.
-u\leq -3-1
Subtract 1 from both sides.
-u\leq -4
Subtract 1 from -3 to get -4.
u\geq \frac{-4}{-1}
Divide both sides by -1. Since -1 is negative, the inequality direction is changed.
u\geq 4
Fraction \frac{-4}{-1} can be simplified to 4 by removing the negative sign from both the numerator and the denominator.
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