Question 666496
EXAMPLE FOR YOU TO STUDY SO YOU CAN UNDERSTAND
 SUBSTITUTION METHOD
     -Y=2X+4
      3X+Y=9
SUBSTITUTE Y IN SECOND EQUATION
3X+Y=9
3X+(2X+4)=9
5X+4=9
5X=5
X=1
YOU CAN USE THE VALUE OF X TO FIND Y BY SUBSTITUTING
                             IN THE FIRST EQUATION
Y=2X+4
Y=2*1+4
Y=6
 ========SOLUTION IS (1,6)