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yarga [219]
3 years ago
15

How do i solve systems of equations by elimination?

Mathematics
1 answer:
stiv31 [10]3 years ago
6 0
First make sure that one of the variable has the same coefficient in each equations. 

For example lets use:
y=x+3
2y=3x-1

Since neither the y's or x's are the same, we must multiply the equations to make them the same. I am going to multiply the first equation by 2 so I can eliminate the y's.

So we get:
2y=2x+3
2y=3x-1

Then we subtract the second equation from the first to eliminate the y's. So we end up with 0=-x+4 and now we solve for x
0=-x+4
x=4 

Now we plug in our x into either original to get the y-value. I am using the first
y=x+3
y=4+3
So the x=4 and y=7

Hope this helps!
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12/5 rename the fractions as mixed numbers
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Step-by-step explanation:

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Use the Law of Sines to find the value of a, as follows:

sin 50 deg      sin 62 deg
-------------- = ----------------
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a = 
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Fofino [41]

Answer:


Step-by-step explanation:

The answer is B

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