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CBSE Class 10 Answered

solve the pair of equations by the substitution method.

3x-y=3    ,       9x-3y=9

Asked by shashikant | 30 Apr, 2014, 07:44: AM
answered-by-expert Expert Answer
Here, the second equation is the multiple of the first equation.
 
That is 9 x minus 3 y minus 9 equals 3 open parentheses 3 x minus y minus 3 close parentheses
 
We need two equations to find the values of the variables x and y.
 
The equation 3 x minus y equals 3 is the equation of the straight line and hence it has infinitely many solutions.
 
Observe the following graph of the straight line.
 
Answered by | 30 Apr, 2014, 09:01: AM

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