Answer:
3x + x + 100° = 180°
⇔ 4x = 80°
⇔ x = 20°
Step-by-step explanation:
Answer:
31/5
Step-by-step explanation:
[f(4) - f(-1)] / 4-(-1)
Step-by-step explanation:
555-22 = 533
Last step...
8x = 80 ---divide both sides by 8 ---division property
x = 80/8
x = 10