Question 52162
X+Y=9 & 2X-4=Y+2 OR X=9-Y THUS 2(9-Y)-4=Y+2 OR 18-2Y-4=Y+2 OR 14-2Y=Y+2 OR

14-2=Y+2Y OR 12=3Y OR Y=12/3 OR Y=4 THEN X+4=9OR X=9-4 OR X=5 

PROOF 2*5-4=4+2 OR 10-4=6 OR 6=6