Ответ:
x+2y=7
2x-3y=5
x=7-2y
2*(7-2y)-3y=5
14-4y-3y=5
-7y=5-14
-7y=-9
y=9/7
x=7-2y=7-2*9/7=31/7
Объяснение:
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Ответ:
x+2y=7
2x-3y=5
x=7-2y
2*(7-2y)-3y=5
14-4y-3y=5
-7y=5-14
-7y=-9
y=9/7
x=7-2y=7-2*9/7=31/7
Объяснение: