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ExtremeBDS [4]
3 years ago
8

Slove the system Of Linear Eqitions by Elimination 3x-y=0 2x+y=-10

Mathematics
1 answer:
Arlecino [84]3 years ago
5 0

Answer:

<em>(-2, -6)</em>

Step-by-step explanation:

Given the simultaneous equation

3x-y=0 ... 1

2x+y=-10 ... 2

Add both equations to eliminate y

3x + 2x = 0 - 10

5x = -10

x = -10/5

x = -2

Substitute x = -2 into 1

3(-2)- y = 0

-6 - y = 0

-y = 0+ 6

-y = 6

y = -6

<em>Hence the coordinate (x, y) is (-2, -6)</em>

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soymeal is 14 percent protein cornmeal is 7 percent protein how many pounds of each should be mixed together in order to get 280
erma4kov [3.2K]
Let the weight of soymeal be s, and let the weight of cornmeal be c.
You need a total of 280 lb, so that gives us one equation.

s + c = 280

Now we use the protein to write another equation.
The protein in s lb of soymeal is 0.14s.
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This gives us a second equation.

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Now we solve the two equations as a system of equations.

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Solve the first equation for s and plug in tot eh second equation.

s = 280 - c

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Now we substitute c = 200 in the first equation to find s.

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6 0
3 years ago
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xenn [34]
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Step-by-step explanation:

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Answer:

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