Question

Solve: -15 = -2.7 + t

Answer 1

-15 = -2.7 + t

add 2.7 to each side

-15+2.7 = -2.7+2.7 +t

-12.3 = t

Answer 2

Answer by JKismyhusbandbae:

$\mathrm{Switch\:sides}\\-2.7+t=-15\\\mathrm{Add\:}2.7\mathrm{\:to\:both\:sides}\\-2.7+t+2.7=-15+2.7\\Simplify\\t=-12.3$