Respuesta :

rorisangletsoalo94

Answer:

x=40

Step-by-step explanation:

80°+(2x+20)°= 180°... (co-interior angles are supplementary)

2x=180 - 80 - 20

2x=80

(divide both sides by the coefficient of x which is 2)

x=80÷2

x=40

Check:

(2x+20) must be equal to 100

Let x=40

Therefore :

2X40+20

=100

SDCInfinity

Answer:

x = 40

Step-by-step explanation:

These angles are known as same-side interior angles. They are supplementary angles meaning they have a sum of 180°.

[tex]2x+20+80=180\\2x+100=180\\2x=80\\x=40[/tex]