Answer:
A triangle has angle’s that add up to 180
[tex]180 - 135 = 45 \\ \\ 4x + 5x = 45 \\ 9x = 45 \\ x = \frac{45}{9} \\ x = 5[/tex]
[tex]4x = 5 \times 4 = 20 \\ [/tex]
[tex]5x = 5 \times 5 = 25[/tex]
Angle A is then 25°
