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Милка2024
@Милка2024
July 2022
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Решите систему, x+y=5 и 7x+4y=640
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barbariss
X+y=5
7x+4y=640
x=5-y
7(5-y)+4y=640
x=5-y
35-7y+4y=640
x=5-y
-3y=640-35
x=5-y
-3y=605
x=5-y
y=-201 2/3
x=5+201 2/3
y=-201 2/3
x=206 2/3
y=-201 2/3
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Answers & Comments
7x+4y=640
x=5-y
7(5-y)+4y=640
x=5-y
35-7y+4y=640
x=5-y
-3y=640-35
x=5-y
-3y=605
x=5-y
y=-201 2/3
x=5+201 2/3
y=-201 2/3
x=206 2/3
y=-201 2/3