What is -7y= -91 i'm now learning coefficients and constants that my teachers won't with when i have 2 math teachers

I hope this helps you

(-)÷(-)= +

-7y= -91 divided -7 two sides

-7y÷(-7)= -91÷(-7)

y=13

-7y=-91
You have to divide the -7 on both sides so you cancel out the -7 in front of the y then you will end up with y= -91 / -7
Then you divide the -91 by -7

This is what i found “answer: a rigid transformation preserves both the side lengths and the angle measures of a polygon. step-by-step explanation: rigid transformations are the transformations which does not affect the size and the shape of figure .” i hope this you for what your looking for. can you plz mark me brainliest?