8x+2y=11
6x-4y=4
8x+3y=-21
4x+5y=-7
8x+2y=11 /*2
6x-4y=4
16x+4y=22
6x- 4y = 4
22х= 26
х= 13/11
8*13/11+2y=11
2у= 11- 104
11
у= 17/22
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8x+3y=-21
4x+5y=-7 / *(-2)
8x+3y=-21
-8x-10y=14
-7у= -7
у= 1
8х+3*1=-21
8х= -21-3
х= -24/8 = -3
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