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zhannawk [14.2K]
3 years ago
10

What does B equal ????

Mathematics
2 answers:
kondor19780726 [428]3 years ago
7 0

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4vir4ik [10]3 years ago
4 0

The angle A is equal to B because they are opposite angles by the vertex.

So...

5x - 15 = 2x + 21

For solve it, we are going to do the same operations in both sides of the equal sign. We need put all the X in a side of the equal sign and all the free numbers in the other side.

5x - 15 = 2x + 21

We are going to add 15

5x - 15 + 15 = 2x + 21 + 15

5x = 2x + 36

We are going to substract 2x

5x - 2x = 2x + 36 - 2x

3x = 36

We are going to divide by 3

3x/3 = 36/3

x = 12

<h2>X = 12</h2>

and

<h2>B = A</h2>
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