Question

if x=2 y= 1 is a solution of the equation 2c + 3y I find the value of k​

Answer 1

Given equation, 2x+3y=k

x=2,y=1 is solution of resultant equation.

2(2)+3(1)=k

∴k=7

∴  Resultant equation is 2x+3y=7

At x=0,2(0)+3y=7 y=  3 7 ​  

At  y=0,2x+3(0)=7 x=  2 7 ​   ∴(0,  3 7 ​  ) and (  2 7  ,0) are two more solutions of resultant equations.