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valentinak56 [21]
4 years ago
8

PLEASE HELP! I WILL GIVE BRAINLIEST

Mathematics
2 answers:
larisa86 [58]4 years ago
7 0

Answer:

x=40 degrees

Step-by-step explanation:

there is 180 degrees in half a circle,and 180-100=80

and because there are 2 x values on either side you divide that 80 by 2 which gives you 40.

Nitella [24]4 years ago
6 0

Answer:

x=40

Step-by-step explanation:

The 3 angles are on a straight line, which means they are supplementary. When added together, they must equal 180 degrees.

x+x+100=180

Combine like terms by adding the 2 x's together

2x+100=180

To solve the equation, we want to find out what x is. In order to do this, we have to get x by itself. Perform the opposite of what is being done to the equation. Keep in mind, everything done to one side, has to be done to the other.

First, subtract 100 from both sides, because 100 is being added to 2x. Subtraction is the opposite of addition.

2x+100-100=180-100

2x=180-100

2x=80

Next, divide both sides by 2. x is being multiplied by 2, and division is the opposite of multiplication.

2x/2=80/2

x=80/2

x=40

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