Answer yes or no.

? Yes No  1. Is $t = 0$ a solution to the equation $\displaystyle t+1 = \frac{1-t}{t}$?

? Yes No  2. Is $a = 0$ a solution to the equation $\displaystyle \frac{3+a}{3-a} = 1$?

? Yes No  3. Is $t = 3$ a solution to the equation $\displaystyle t + 3 = t^2 + 9$?

? Yes No  4. Is $x = 4$ a solution to the equation $\displaystyle x + 3 = x^2 - 9$?

? Yes No  5. Is $t = 0$ a solution to the equation $\displaystyle 20 - t = 20 + t$?