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mashenka204
@mashenka204
April 2021
1
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Помогите пж очень нужно
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BlackVortex
Verified answer
1.
y=20+x
2x-15y=-1
2x-15(20+x)=-1
x=-23
2(-23)-15y=1
y=-3
(x,y)=(-23,-3)
-3-(-23)=20
2*(-23)-15*(-3)=-1
20=20
-1=-1
2.
x=4y+25
3x-2y=30
3(4y+25)-2y=30
y=-9/2
3x-2*(-9/2)=30
x=7
(x,y)=(7,-9/2)
25-7=4*(-9/2)
3*7-2*(-9/2)=30
18=18
30=30
2 votes
Thanks 1
mashenka204
Спасибоо огромное
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Answers & Comments
Verified answer
1.y=20+x
2x-15y=-1
2x-15(20+x)=-1
x=-23
2(-23)-15y=1
y=-3
(x,y)=(-23,-3)
-3-(-23)=20
2*(-23)-15*(-3)=-1
20=20
-1=-1
2.
x=4y+25
3x-2y=30
3(4y+25)-2y=30
y=-9/2
3x-2*(-9/2)=30
x=7
(x,y)=(7,-9/2)
25-7=4*(-9/2)
3*7-2*(-9/2)=30
18=18
30=30