Solve for t
t\in \mathrm{R}
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5-0t<21+0\times 5\left(t+1\right)
Multiply 0 and 3 to get 0.
5-0<21+0\times 5\left(t+1\right)
Anything times zero gives zero.
5<21+0\times 5\left(t+1\right)
Subtract 0 from 5 to get 5.
5<21+0\left(t+1\right)
Multiply 0 and 5 to get 0.
5<21+0
Anything times zero gives zero.
5<21
Add 21 and 0 to get 21.
t\in \mathrm{R}
This is true for any t.
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