fayechadx
26.01.2020 •
Mathematics
There is 7 more math problem
1. 2x+ 4y = 10
-4x+ y =-22
2. 5x+y=-12
5x-7y=4
3. 7x+y=10
-7x-10y=26
4. 4x-2y=-14
3x-2y=-14
5. 6x+2y=20
-3x+3y=-30
6. -5x+4y=-3
-9x-y=30
7. -9x+6y=27
-x+3y=10
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Ответ:
Step-by-step explanation:
2x+4y=10
-4x+y=-22
2(2x+4y)=2(10)
-4x+y=-22
4x+8y=20
-4x+y=-22
9y=-2
y=-2/9
2x+4(-2/9)=10
2x-8/9=10
2x=10+8/9
2x=98/9
x=(98/9)/2
x=(98/9)(1/2)
x=98/18
x=49/9
x=49/9, y=-2/9. (49/9, -2/9).
Ответ:
pfr
Explanation: