Question

9/10 times a number plus 6 is 51

Answer 1

n-the number


`(9)/(10)\cdot n+6=51\ \ \ \ \ \ |subtract\ 6\ from\ both\ sides\\\\(9)/(10)n=45\ \ \ \ \ \ |multiply\ both\ sides\ by\ 10\\\\9n=450\ \ \  \ \ |divide\ both\ sides\ by\ 9\\\\\boxed{n=50}`

Answer 2

Let the required number be "n"
Then the equation becomes

9n/10 + 6 = 51
9n/10 = 45
To eliminate 9/10,
We multiply both sides with 10/9,
Therefore, n = 45 x (10/9)

Thus, n = 50

The number is 50