Answer:
x = 33
Step-by-step explanation:
supplementary angles are two angles whose sum is 180°
viusal example, check attached image
Step 1: Find x
(3x + 45) + (2x - 30) = 180
(3x + 2x) + (45 -30) = 180
5x + 15 = 180
5x + 15 - 15 = 180 - 15
5x = 165
5x / 5 = 165 / 5
x = 33
checking work:
Step 2: Finding Angle A by plugging x in
3x + 45
3(33) + 45 = 144
Anglw A = 144°
Step 3: Finding Angle B by plugging x in
2x - 30
2(33) - 30 = 36
Angle B = 36°
Angle A + Angle B = 180°
144° + 36° = 180° TRUE x is correct
