Question

GUYS PLEASE HELP!!!! SOLVE THIS SYSTEM OF EQUATIONS!!!!! AND PLEASE EXPLAIN ME STEP BY STEP!!!! PLEASEEE IT'S VERY IMPORTANT FOR ME!!! IT'S MY HOMEWORK. х^2+у^2=13; 10х+у-9=10у+х!!!!!!

Answer 1

x^2+y^2=13
10x+y-9=10y+x
9x+y-9=10y
9x-9y-9=0
9x-9y=9
Divide everything by 9
x-y=1
y+1=x
y=x-1

That's about as far as I've gotten at the moment, I have to eat dinner but I'll be back.