How many pairs of (x,y) satisfy the equations 3x+6y=21 and 4x+8y=16

2 years ago

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Answers : (4)

                    

as 3/4=6/8  so these lines are parallel, i.e. have no common point, so 0 pairs of (x,y) will satisfy this

2 years ago
                    

3x + 6y = 21


or, x+2y=7


 


4x+8y=16


x+2y=4


 


Inconsistent equations. No solution.

2 years ago
                    

dear suresh,


these two equations reaemble two parallel lines as a1/a2=b1/b2not equal to c1/c2.


so these two lines never intersect and thus have no solution

one year ago
                    

no solution since they are parallel lines
please post some tough questions next time
:)

one year ago

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