Question

Which of the following linear equations represents the statement "Difference of ages of two students of mathematics is 15"?

x-2y=15

x - y = 15

x - 15y = 0

x+y=5​

Answer 1

Answer:

x-y = 15 will be the correct equation.

Answer 2

Here, linear equation is x-2 = 0 ⇒ x = 2

Thus, it is parallel to y-axis.

Question.2 If (1, -2) is a solution of the equation 2x – y = p, then find the value of p.

Solution.

Step-by-step explanation:

PUT X=1,Y=-2WE HAVE  2(1) --2 =P

P=4 SO 4=P