Respuesta :

jackiezhang2007

We use addition, or rather the addition property of equality.

t-19+19=2+19

t=21

:D

kcrawford08

Step-by-step explanation:

Addition is the inverse operation.

inverses:

addition/subtraction

multiplication/ division

If you need to solve for t:

t-19=2

add 19 to both sides to isolate the variable (t)

t=21