What is the value of x?

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x =

The answer of your question is: x = 5

Step-by-step explanation:

It's and isosceles triangle then ∠ A = ∠C

                            73 = 8y - 7

                            8y = 73 + 7

                            8y = 80

                            y = 80 / 8

                            y = 10

                   ∠  C = 8(10) -7

                   ∠  C = 73°

The sum of the internal angles in a triangle equals 180°

  ∠A + ∠B + ∠C = 180°

 73° + (6x + 4) + 73° = 180°                            Substitution

 6x + 4 = 180 - 73 - 73

 6x =34 - 4

 6x = 30

   x = 30 / 6

   x = 5

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