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kotykmax [81]
3 years ago
13

How do you do x - y = 4 -4 + 2y= -4

Mathematics
2 answers:
Nimfa-mama [501]3 years ago
7 0
The way to do this is:(Look at picture)

nadezda [96]3 years ago
3 0
X-y=4
-4+2y=-4   Start with the second equation by adding 4 to both side of the equation. that will give you 4-4+2y=-4+4. the answer is 2y=0. Now if you divide both sides by 2 you end with 2y/2=0/2, the result is y=0.
Now substitute this answer for y in the first equation of x-y=0. Once you substitute it should look like this, x-0=4, therefore, x=4.
Hope this helps you. 
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using a graph tool----------> to calculate the quadratic equation
see the attached figure
the solution is
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the answer is
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3 years ago
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olasank [31]

Answer:

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