Question 31741
3X~2+Y~2=3
4X~2+5Y~2=26 MULTIPLYING THE FIRST EQUATION BY -5 WE GET 
-15X~2-5Y~2=-15 ADDING THIS TO THE SECOND EQUATION 
4X~2+5Y~2=26 WE GET

-11X~2=11 OR X~2=-1 SUBSTITUTING THIS IN THE SECOND EQUATION WE GET
4(-1)+5Y~2=26 OR -4+5Y~2=26 OR 5Y~2=30 OR Y~2=30/6 OR Y~2=6

PROOF 3(-1)+6=3 OR -3+6=3 OR 3=3 AND
4(-1)+5(6)=26 OR -4+30=26 OR 26=26