Answer:
Maybe -12?
Step-by-step explanation:
Because sometimes variables on their own symbolize 1, so we can subtract 13 from 1 to get -12.
Answer:
SOLVE FOR X
x=2
Step-by-step explanation:
Answer:
400
Step-by-step explanation:
800-400=400
Answer:
-2,-3
Step-by-step explanation:
3x+5y=10 and 5x-3y=-6 is perpendicular.