Respuesta :

Nirjhara

35 is the answer

Explanation, the sum of interrior angme is 180degree

x+(3x+40)= 180

or, 4x= 180-40

or, x= 140÷ 4

or x = 35

Answer:

B

Step-by-step explanation:

For the 2 lines to be parallel, then the 2 angles are same- side interior angles and are supplementary, thus

x + 3x + 40 = 180 , that is

4x + 40 = 180 ( subtract 40 from both sides )

4x = 140 ( divide both sides by 4 )

x = 35 → B