For all real values of c, the pair of equations
x – 2y = 8
5x – 10y = c
have a unique solution. Justify whether it is true or false.
Is the pair of equations x + 2y – 3 = 0 and 6y + 3x – 9 = 0 consistent? Justify your answer.
Do the equations 4x + 3y – 1 = 5 and 12x + 9y = 15 represent a pair of coincident lines? Justify your answer.
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