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Dmitriy789 [7]
3 years ago
10

CAN YOU HELP ME WITH THIS​

Mathematics
2 answers:
____ [38]3 years ago
8 0

the sum of the expanded angle is 180⇒

40+40+2x+30=180\\2x=70\\x=35

Vera_Pavlovna [14]3 years ago
3 0

Answer:

x=35

Step-by-step explanation:

Add the 2 known angles: 80°

Then subtract them from eight since a straight line is 180°: 180-80= 100

then you have the equation: 2x+30=100

2x+30=100

     -30  -30

      2x=70

       \frac{2x}{2} =\frac{70}{2}

        x=35

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