Its an isosceles triangle. Therefore m∠C = m∠A → m∠C = 73°:
[tex]8y-7=73[/tex] add 7 to both sides
[tex]8y=80[/tex] divide both sides by 8
[tex]\boxed{y=10}[/tex]
We know: The sum of measures of the angles of a triangle is equal 180°.
Therefore we have the equation:
[tex]6x+4+73+73=180[/tex]
[tex]6x+150=180[/tex] subtract 150 from both sides
[tex]6x=30[/tex] divide both sides by 6
[tex]\boxed{x=5}[/tex]
