When adding or subtracting to decimals what is the first thing you must do

$15 each

step-by-step explanation:

$45/3 children= $15 each

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.