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Question

Determine graphically whether the following pair of linear equations 2x3y=5, 3x+4y=1 has (a) a unique solution (b) infinitely many solutions or (c) no solution.

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Solution

2x3y=52x3y5=0
3x+4y=13x+4y+1=0
on comparing theses two equation with ax+by+c=0
a1=2,b1=3,c1=5
a2=3,b2=4,c2=1
a1a2=23b1b2=34c1c2=5
a1a2b1b2
Therefore given pair of lines has unique solution.

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