2x=2-9
21y=4-6x
2x=-7
6x=4-21y
x=-7/2
6(-7/2)=4-21y
-21=4-21y
-21-4=-21y
-25=-21y
y=-25/-21
:.y=1 4/21.
Answer:
Point B is the result of a 90° counterclockwise rotation.
Step-by-step explanation:
