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 :

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

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

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

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

• $x\degree = \dfrac{200\degree}{5\degree}$

• $x\degree = 40\degree$