Answer:
Step-by-step explanation:
A diameter of the circle.
x=28
-7(3+6x)=9(-5x+7)
-21-42x=-45x+63
-21-42x-(-45x)=63
-21-42x+45x=63
-21+3x=63
3x=63-(-21)
3x=63+21
3x=84
x=84/3
so yea what was the answer again
