Question

how to solve this plz tell I will gift you 1000 diamonds​

Answer 1

Answer:

Step-by-step explanation:

they all form a straight line means they make 180° in maths it is called a linear pair.

$\large \sf 3x-5+x+20+65=180$

$\large \sf 4x+80=180$

$\large \sf 4x=180-80$

$\large \sf x= \dfrac{100}{4}$

$\large \sf x= 25$