SOLVE THE FOLLOWING LINEAR EQUATIONS BY 《(1)SUBSTITUTION METHOD,
(2)GRAPHICAL METHOD,
(3) CROSS MULTIPLICATION METHOD
(4) ELIMINATION METHOD》
(a). 2X- Y=1
2X+Y=3
(b). 3X+2Y=5
2X-3Y= - 1
( c). 2X-Y=9
X+2Y=7
(d) X+3Y=13
2X-Y= - 2
(e) X+Y=10
2X-Y =2
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