Question 178689
Determine whether each system of linear equations has (a) one and only one solution, (b) infinitely many solutions, or (c) not solution. Find all solutions whenever they exist. 
 x - 3y = -1
4x + 3y = 11
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Add to solve for "x":
5x = 10
x = 2
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Substitute to solve for "y":
2 - 3y = -1
3y = 3
y = 1
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one and only one solution
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Cheers,
Stan H.