Answer:
x = 10
Step-by-step explanation:
We know: the sum of the measures of triangle angles is 180°.
Therefore we have the equation:
[tex](6x-5)+5x+75=180[/tex] combine like terms
[tex](6x+5x)+(-5+75)=180[/tex]
[tex]11x+70=180[/tex] subtract 70 from both sides
[tex]11x=110[/tex] divide both sides by 11
[tex]x=10[/tex]
