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deer15
30.01.2021 •
Mathematics
1. Solve the system of equations: 2x + y = -2
5x + 3y = -8
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Ответ:
x=2 and y=−6
Step-by-step explanation: 2x+y=−2, 5x+3y=−8
2x+y=−2
2x+y+−2x=−2+−2x
y=−2x−2
5x+3y=−8
5x+3(−2x−2)=−8
−x−6+6=−8+6
−x=−2
−x /−1 = −2 /−1
x=2
y=−2x−2
y=(−2)(2)−2
y=−6
x=2 and y=−6
Ответ:
The law of conservation of energy is a law that states that energy can neither be created nor destroyed it can only change forms