The values of x for these angles are given as follows:
12) x = 97º.
13) x = 109º.
How to find the measures of x?
In both problems, the angles form a complete circle, meaning that the sum of the angles is of 360º.
Hence, in item 12, we find x as follows:
293 + 26 + x - 56 = 360
263 + x = 360
x = 360 - 263
x = 97º.
For item 13, x is given as follows:
218 - 3 + x + x - 73 = 360
2x + 142 = 360
2x = 218
x = 218/2
x = 109º.
More can be learned about measures of angles at https://brainly.com/question/25716982
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