Respuesta :

Sumin
Original Equation:
12r - 6s = t
Add 6s to both side of the equation:
12r - 6s + 6s = t + 6s
Simplify:
12r = t + 6s
Division Property of Equality:
12r/12 = 6s/12 + t 
Answer:
r = t + .5s