Question

(?,7) is on the line y = 2x + 5. Find the other half of the coordinate.

Answer 1

The x coordinate is 1.
y=2x+5
7=2x+5
2=2x
1=x

Answer 2

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

`y= 2x+5~~~~~~~~~~~~~~~~~~~~~~(i)`

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

`y=2x+5\\\\\Rightarrow 7=2* a+5\\\\\Rightarrow 7=2a+5\\\\\Rightarrow 2a=7-5\\\\\Rightarrow 2a=2\\\\\Rightarrow a=1.`

Therefore, the value of 'a' is 1.

Thus, the other half of the co-ordinate is 1.