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Женечка791
@Женечка791
August 2022
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Решите систему уравнений методом подстановки:
3х+у=1,
х+2у=7;
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natyak
Y=1-3x
x+2(1-3x)=7
y=1-3x
x+2-6x=7
y=1-3x
-5x+2=7
y=1-3x
-5x=5
y=1-3x
x=-1
y=1-3*(-1)=4
x=-1
Відповідь (-1;4)
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Женечка791
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natyak
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Answers & Comments
x+2(1-3x)=7
y=1-3x
x+2-6x=7
y=1-3x
-5x+2=7
y=1-3x
-5x=5
y=1-3x
x=-1
y=1-3*(-1)=4
x=-1
Відповідь (-1;4)