Question

y + 10x + 9 = 3(x+10y)
find x and y​

Answer 1

y + 10x + 9 = 3(x + 10y)

y + 10x + 9 = 3x + 30y

10x - 3x + 9 = 30y - y

7x + 9 = 29y

we can write like this also,

29y = 7x + 9

y = 7x + 9/29

and

7x + 9 = 29y

7x = 29y - 9

x = 29y - 9/7

this is the answer of this question.