11x+15y=-23;7x-2y=20
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11x+15y=-23 -----------------------------(1)
7x-2y=20 ----------------------------------(2)
Multiplying (1) with 2 and (2) with 15 we get,
22x+30y=-46
105x-30y=300
---------------------
127x=254 (adding)
or, x=254/127
or, x=2
Putting in (2), we get
7×2-2y=20
or, -2y=20-14
or, -2y=6
or, y=6/-2
or, y=-3
∴, x=2,y=-3
7x-2y=20 ----------------------------------(2)
Multiplying (1) with 2 and (2) with 15 we get,
22x+30y=-46
105x-30y=300
---------------------
127x=254 (adding)
or, x=254/127
or, x=2
Putting in (2), we get
7×2-2y=20
or, -2y=20-14
or, -2y=6
or, y=6/-2
or, y=-3
∴, x=2,y=-3
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