Problem 1
Answer: x = 3
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Step-by-step explanation:
Angles ABC and XYZ are supplementary. By definition, they can be glued together to form a straight line of 180 degrees.
(angle ABC)+(angle XYZ) = 180
(163)+(5x+2) = 180
5x+165 = 180
5x = 180-165
5x = 15
x = 15/5
x = 3
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Problem 2
Answer: x = 6
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Step-by-step explanation:
This is similar to problem 1. A linear pair of angles are always supplementary. More specifically, a linear pair of angles are supplementary and they are adjacent as well.
Add up the angles, set the sum equal to 180, and solve for x.
(angleX) + (angleY) = 180
(24x-36) + (12x) = 180
36x-36 = 180
36x = 180+36
36x = 216
x = 216/36
x = 6