To rewrite the equation by subtracting \(2t\) from both sides, start with the given heights of Plant A and Plant C:
\[ 4 + 2t = 8 + 2t \]
Now, we subtract \(2t\) from both sides:
\[ 4 + 2t - 2t = 8 + 2t - 2t \]
Which simplifies to:
\[ 4 = 8 \]
This result indicates that the equations \(h=4+2t\) and \(h=8+2t\) do not hold true simultaneously, as 4 does not equal 8. Therefore, the height equations for Plant A and Plant C cannot be equal for any value of \(t\).