Answer:
x equals 9.
The largest angle is 90.
Step-by-step explanation:
[tex]10x + 3x + 7x = 180 \\ \frac{20x}{20} = \frac{180}{20} \\ x = 9[/tex]
[tex]x = 9 \\ 10x \\ 10(9) \\ 90[/tex]
