Respuesta :

Answer: x=28

Step-by-step explanation:

55−72−(−45)=x

Step 1: Simplify both sides of the equation.

55−72−(−45)=x

55+−72+45=x

(55+−72+45)=x(Combine Like Terms)

28=x

28=x

Step 2: Flip the equation.

x=28