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sweetcloud3
@sweetcloud3
July 2022
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Можно хотя-бы один с объяснением? Пожалуйста)
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nastushka14
1.x + y = 1
x - y = 5
2x = 6
x = 3
3 + y = 1
y = 1 - 3
y = -2
2. 5x-2y=-12
3x+4y=-2
10x-4y=-24
3x+4y=-2
-13x=-6
-x=-2
-10+2y=12
-2y=-12+10
-2=2:(-2)
-y=-1
3.2x-7y=39
x+y=-3
2x-7y=39
-2x+2y=-6
-9y=45:(-9)
y=-5
2x+35=39
2x=39-35
2x=4:2
x=2
4.x+2y=5
-x+7y=13
9-y=18:9
y=2
x+y=5
x=5-4
x=1
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Answers & Comments
x - y = 5
2x = 6
x = 3
3 + y = 1
y = 1 - 3
y = -2
2. 5x-2y=-12
3x+4y=-2
10x-4y=-24
3x+4y=-2
-13x=-6
-x=-2
-10+2y=12
-2y=-12+10
-2=2:(-2)
-y=-1
3.2x-7y=39
x+y=-3
2x-7y=39
-2x+2y=-6
-9y=45:(-9)
y=-5
2x+35=39
2x=39-35
2x=4:2
x=2
4.x+2y=5
-x+7y=13
9-y=18:9
y=2
x+y=5
x=5-4
x=1