Question

a two digit no. is 9 times the sum of its digits. if its unit's and ten's digits be x and y respectively, write this information in the form of linear equation in two variables . represent this equation by graph.

Answer 1

Answer:

Step-by-step explanation:

10x+y be 2 digit number,

10x+y=9x+9y

10x-9x=9y-y

X=8y

Substitute y values as 1,2,etc... And note the x values and mark it in graph..

Answer 2

${\huge\star{\mathfrak{\underline{\underline{Solution:}}}}}$

Let the unit digit of number be x

and

tens digit of number be y

Thus, number be 10y+x

Now,

According to the situation given in Question we find,

10y + x = 9(x + y)

10y + x = 9x + 9y

10y + x - 9x - 9y = 0

y - 8x = 0

Now, finding solutions of the equation

put y = 0

we get, x = 0

and

put y = 16

we get, x = 2