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Question 807688: I don't understand how to solve or graph x-y=-2
y=-3
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! We have two linear equations:
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L1: x - y = -2
L2: y = -3
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To solve them means to find the point or points of intersection, if any, between L1 and L2.
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Substitute -3 (the value of y from L2) for y in L1:
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L1: x - y = -2
L1: x - (-3) = -2
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Now solve for x:
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x - (-3) = -2
x + 3 = -2
x = -2 - 3
x = -5
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Now plug-in (-5) for x into L1 and solve for y:
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L1: x - y = -2
L1: (-5) - y = -2
(-5) - y = -2
y = (-5) + 2
y = -3
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Answer:
L1 and L2 intersect at the point p0 = (-5, -3)
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To check the answer, plug-in the point p0 into L1 and into L2.
The point p0 satisfies both L1 and L2 so its a correct answer.
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https://sooeet.com/math/linear-equation-solver.php
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https://sooeet.com/math/quadratic-formula-solver.php
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https://sooeet.com/math/fraction-decimal-percent.php
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Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php
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