an angle measures 49°. its supplement measures (2x+9)°. find x
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an angle measures 49°. its supplement measures (2x+9)°. find x
an angle measures 49°. its supplement measures (2x+9)°. find x
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Answer: x=61
Step-by-step explanation:
First: Reduce 49 from 180
180-49=131, So, the supplement of 49 is 131. Supplement means, when you add the two angles, their sum should be 180.
Second: 2x+9=131
You already know the supplement of 49 is 131. Now, you have to extract the value of x.
Third: Compute for x
2x+9 = 131
2x = 131-9 (You have to separate the constant and the variable)
2x = 122 (Since x has a coefficient of 2, you have to divide 122 to 2)
x = 61
Answer:
Watch this video to understand :))))
https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-geometry/cc-7th-unknown-angle-algebra/v/example-using-algebra-to-find-measure-of-supplementary-angles