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gindarf
@gindarf
September 2021
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Решите плз. там надо через x и y
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karinochkabanana01
1). y=3x
x+y=4
X+3x=4
X=1
Y=3•1
X=1;y=3
2) y=2x+5
y=3x+7
2x+5=3x+7
x=-2
y = 2•(-2)+5
y= 1
x=-2;y=1
3) x+2y=4
x-y=1
X+2y =4
X=1+y
1+y+2y=4
y=1
X=1+1
X=2
X=2;y=1
4). X-2y=7
y=2x+1
X-2 (2x+1)=7
X=-3
y=2x(-3)+1
y=-5
x=-3;y=-5
0 votes
Thanks 1
gindarf
спасибо большое
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Answers & Comments
x+y=4
X+3x=4
X=1
Y=3•1
X=1;y=3
2) y=2x+5
y=3x+7
2x+5=3x+7
x=-2
y = 2•(-2)+5
y= 1
x=-2;y=1
3) x+2y=4
x-y=1
X+2y =4
X=1+y
1+y+2y=4
y=1
X=1+1
X=2
X=2;y=1
4). X-2y=7
y=2x+1
X-2 (2x+1)=7
X=-3
y=2x(-3)+1
y=-5
x=-3;y=-5