Answer:
[tex]\Huge\boxed{\mathsf{\longrightarrow T=17}}[/tex]
Step-by-step explanation:
GIVEN:
Isolate t on one side of the equation.
SOLUTIONS:
First, switch sides.
t+4=21
Next, subtract 4 from both sides.
t+4-4=21-4
Solve.
Subtract the numbers from left to right.
21-4=17
[tex]\Large\boxed{\mathsf{T=17}}[/tex]
Therefore, the solution is t=17.
