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ememberkidrauhl1
@ememberkidrauhl1
July 2022
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Помогите решить 2 "линейных уравнения",
Способом подстановки:
а)
х+5y=7
3х+2y= -5
б)
3х-y=3
3х-2y=0
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Answers & Comments
Zidis
A)x=7-5y
3*(7-5y)+2y=-5
21-15y+2y=-5
-13y=-26
y=2
б)3x-y=3
3x-2y=0
y=3x-3
3x-2*(3x-3)=0
3x-6x+6=0
-3x=-6
x=2
2 votes
Thanks 2
ememberkidrauhl1
спасибо! =)
Zidis
всегда пожалуйста))
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Answers & Comments
3*(7-5y)+2y=-5
21-15y+2y=-5
-13y=-26
y=2
б)3x-y=3
3x-2y=0
y=3x-3
3x-2*(3x-3)=0
3x-6x+6=0
-3x=-6
x=2