Answer: x=8
Step-by-step explanation:
15*8 = 120 + 20 = 140
140+40 = 180 a perfect line
Answer:
Below
Angle on a straight line =180
[tex]40\° + (15x +20)\°=180\°\\\\40 \°+(15(8)+20)\° =180\°\\\\40\°+(120+20)\°=180\°\\\\40\°+140\°=180\°\\\\180\°=180\°[/tex]
