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Sagot :
Answer:
None, because 0 cannot equal 1.
Step-by-step explanation:
y = x - 5
2x - 2y = 8
First let's solve for y in the bottom equation
Subtract 2x form both sides
2x - 2y = 8
- 2x - 2x
-2y = 8 - 2x
Divide both sides by -2
-2y/-2 = (8 - 2x)/-2
y = x - 4
Now substitute the y's in both equations
x - 4 = x - 5
Move like terms to one side by adding 4 to both sides
x - 4 = x - 5
+ 4 + 4
x = x - 1
Subtract x from both sides
x = x - 1
- x - x
0 = 1
Zero cannot equal one, meaning this system of equations is invalid and has no solutions.
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