Question

Can you help me ? and can you explain it to me please​

Answer 1

`\large \mathfrak{Solution : }`

As we know, sum of interior angles of a triangle measures 180°

let's solve for value of x :

• 
  `x \degree+ (x - 17)\degree + (3x - 3)\degree = 180\degree`

• 
  `(x + x + 3x)\degree + ( - 17\degree - 3\degree) = 180\degree`

• 
  `5x\degree - 20\degree = 180\degree`

• 
  `5x \degree= 180\degree + 20\degree`

• 
  `x\degree = (200\degree)/(5\degree)`

• 
  `x\degree = 40\degree`