4.
Relationship: Linear Pair
(3x) + (2x - 25) = 180
5x - 25 = 180
5x = 180 + 25
5x = 205
5x/5 = 205/5
x = 41
3x
3(41)
= 123°
5.
Relationship: Same-Side Interior Angles
b + 75 = 180
b = 180 - 75
b = 105°
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Answers & Comments
4.
Relationship: Linear Pair
(3x) + (2x - 25) = 180
5x - 25 = 180
5x = 180 + 25
5x = 205
5x/5 = 205/5
x = 41
3x
3(41)
= 123°
5.
Relationship: Same-Side Interior Angles
b + 75 = 180
b = 180 - 75
b = 105°