Respuesta :

5x-3+4x+7+90=180
9x-3+7+90=180
9x+94=180
9x=86
x=9.5555555555555555(etc)
tanisha2005sharma

Answer:

Angle A = 47⁰

Step-by-step explanation:

Angle A = Angle B { equal sides have equal angles. }

so,

4x + 7 = 5x - 3

7 + 3 = 5x - 4x

10 = x

so Angle A = 4x + 7 = 4(10) + 7 = 40 + 7 = 47⁰