find x and y in elimination method
(i)2x-3y=13
7x-2y=20
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2x-3y=13 1)
7x-2y=20 2)
Multiplying 1) and 2) by 7 and 2
14x-21y=91
14x-4y=40
Subtracting them
-17y=51
✨y=-3✨
Substituting value of y in 1)
2x-3(-3)=13
2x=13+9
x=22/2
✨x=11✨
7x-2y=20 2)
Multiplying 1) and 2) by 7 and 2
14x-21y=91
14x-4y=40
Subtracting them
-17y=51
✨y=-3✨
Substituting value of y in 1)
2x-3(-3)=13
2x=13+9
x=22/2
✨x=11✨
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