Respuesta :

ndlovunomangisi

Step-by-step explanation:

54+90+5×+6=360

so add like terms

54+90+6=150

150+5×=360

5×=360-150

5×=210

--- ----

5 5

×=42

esethustokwe

Step-by-step explanation:

90+54+(5x+6)=180...(sum of angles of a triangle)

144+5x+6=180

  1. 5x=180-150
  2. 5x/5=30/5
  3. x=6
good job