Answer: The other half of the co-ordinate is 1.
Step-by-step explanation: Let, 'a' be the other half of the co-ordinate (?, 7) that lies on the following straight line
[tex]y= 2x+5~~~~~~~~~~~~~~~~~~~~~~(i)[/tex]
So, the point (a, 7) lies on the given line. That is, the point (a, 7) will satisfy equation (i).
Substituting (x, y) = (a, 7) in equation (i), we have
[tex]y=2x+5\\\\\Rightarrow 7=2\times a+5\\\\\Rightarrow 7=2a+5\\\\\Rightarrow 2a=7-5\\\\\Rightarrow 2a=2\\\\\Rightarrow a=1.[/tex]
Therefore, the value of 'a' is 1.
Thus, the other half of the co-ordinate is 1.
