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CBSE Class 9 Answered

For a line whose equation is 2x + y = 5, which one of the following points lies on it ? we know that the coordinates of a point on a line must satisfy the equation of the line. Here, On substitution of x = 2, y = 1, we get LHS = 2 (2) + 1 = 5 = RHS. Hence (2, 1) lies on the line 2x + y = 5 .how......????????
Asked by Saloni Bansal | 05 Jul, 2013, 04:55: PM
answered-by-expert Expert Answer
Equation of line: 2x+y = 5. 
 
Now,any (x,y) coordinate which would satisfy this equation i.e. on substituting values of x and y, LHS = RHS, all those poins will lie on the axis. 
 
So, for (2,1); LHS = 2(2) + 1 = 5 = RHS
And hence, (2,1) lies on the line. 
Answered by | 05 Jul, 2013, 05:11: PM
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