Answer:
x = 5
Step-by-step explanation:
The base angles ,A and C are equal
A = C = 73
The sum of the angles of the triangle are 180
A+C+B =180
73+73 + 6x+4=180
6x+150=180
Subtract 150 from each side
6x+150-150=180-150
6x = 30
Divide by 6
6x/6 = 30/6
x = 5
