Respuesta :

amy684

Answer:

x=10

Step-by-step explanation:

3x+40+110=180

3x+150=180

3x=180−150

3x=30

x= 3 /30

x= 10

Answer:

x = 10

Step-by-step explanation:

3x + 2(20) + 110 = 180

3x + 40 + 110 = 180

3x + 150 = 180

      -150    -150

3x = 30

3       3

x = 10

Check:

3x + 2(20) + 110 = 180

3(10) + 2(20) + 110 = 180

30 + 40 + 110 = 180

70 + 110 = 180

180 = 180