manuellopez1981
27.01.2021 •
Mathematics
Standard form (5×100)+(6×10)+(8×1/10)+(6×1/1000)
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Ответ:
Hi! The correct answer is 280403/500!
Step-by-step explanation:
Ответ:
(-1;1)
Step-by-step explanation:
We have the system of equations:
2x + 15y = 13
-3x + 5y = 8
Let's subtract the second equation from the first:
2x - (-3x) + 15 - 5y = 13 - 8
5x + 10y = 5
x + 2y = 1
Now from this equation find x:
x = 1-2y
And substitute it in the second equation:
-3(1-2y) + 5y = 8
-3 + 6y +5y = 8
11y = 11
y = 1
And plug this y value in the first equation:
2x + 15 = 13
x = -1