Please help ASAP. 40 pts

Mathematics

1 answer:

Alex787 [66]4 years ago

7 0

Answer:

x = 40

Step-by-step explanation:

The sum of the angles of a triangle add to 180 degrees

x+2x+x+20 = 180

Combine like terms

4x+20 =180

Subtract 20 from each side

4x+20-20 =180-20

4x = 160

Divide each side by 4

4x/4 =160/4

x = 40

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