Ответ:
x=0.525
y=0.875
Объяснение:
2y+10x=7
10x−6y=0
10x=7-2y
10x-6y=0
x=7/10-y/5
10x-6y=0
x=7/10-y/5
10(7/10-y/5)-6y=0
x=7/10-y/5
7-8y=0
x=7/10-y/5
8y-7=0
x=7/10-y/5
8y=7
x=7/10-y/5
y=7/8
x=21/40
y=7/8
x=0.525
y=0.875
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