Answer:
∠YDC = 140°
∠FAB = 75°
Step-by-step explanation:
17)
The equation
[tex]13x-3=55+3x+2[/tex]
[tex]13x-3x=55+2+3[/tex]
[tex]10x=60\\x=60/10=6[/tex]
∠FAB = 13(6) - 3 = 78 - 3 = 75°
18)
The equation
[tex]15x+5=80+6x+6[/tex]
[tex]15x-6x=80+6-5[/tex]
[tex]9x=81\\x=81/9=9[/tex]
∠YDC = 15(9)+5 = 135 + 5 = 140°
Hope this helps
