Question

find the values of a if x=2,y=1;in a solution of the equation 3x-y=9
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Answer 1

Answer:

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.

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