Respuesta :

x+2x+45=180

Subtract 45 from both sides

180-45=135

x+2x=135

Combine like terms

3x=135

Divide both sides by 3

135/3=45

x=45

Answer:

x=45

Step-by-step explanation:

x+2x+45=180

3x+45=180

3x=135

x=135/3

x=45

Hope it helps.