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Marysya12 [62]
3 years ago
5

What is the value of x?

Mathematics
2 answers:
Scrat [10]3 years ago
7 0

Answer:

75 degrees

Step-by-step explanation:

In a parallelogram, adjacent angles always add up to 180 degrees. So, for example, A+B=180 and C+B=180.

Therefore, A+D=180.

Because we're given that angle A is (x+30) degrees and angle D is x degrees, we can plug them into the below equation:

(x+30)+x=180

Open up the parentheses

x+30+x=180\\2x+30=180

Subtract both sides by 30

2x-30=180-30\\2x=150

Divide both sides by 2

\frac{2x}{2} =\frac{150}{2} \\x=75

Therefore, x is equal to 75 degrees.

I hope this helps!

Ksenya-84 [330]3 years ago
4 0

Step-by-step explanation:

\frac{360 - 2(x  +  30)}{2}  = x \\  360 - 2x - 60 = 2x \\ 300 - 4x = 0 \\ 4x = 300 \\ x = 300  \div 4  = 75

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I hope this helped you. If it did, please consider, rating, pressing thanks and/or giving my answer 'Brainliest.' Have a great day! :)

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