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markusblazer
16.02.2021 •
Mathematics
(2x+y=-2
5x + 3y = -8
Solve by elimination
Solved
Show answers
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Ответ:
y = -6, x =2
Step-by-step explanation:
To solve by elimination, you have to line both equations up together. Then, you multiply both equations until one variable is removed.
2x+y = -2
5x + 3y = - 8
There are many different ways to solve an elimination problem, but generally you should look for the simplest route. Here, I would multiply the top equation by -3.
-6x -3y = 6
5x +3y = -8
Imagine you are adding the two equations together. You end up with
-x = -2
Then solve for x. In this situation, it is fairly simple. Take out a factor of -1.
x = 2
Finally, choose one of your beginning equations and plug your new-found x value back into the equation.
2(2) +y = -2
4 + y = -2
y = -6
Ответ:
M = -2.78log(45) - 1.35
M = -2.78(1.65) - 1.35
M = -4.587 - 1.35
M = 5.937
M = -5.94