Question

If the product of a number and -9 is subtracted from the number, the result is 7 more than the number. find the number

Answer 1

The number is 7/9

For this problem, let us simply follow the word to build an equation:

The product of a number, n, and -9:

-9n

Is subtracted from the number, n:

n - (-9n)

The result is 7 more than the number, n:

n - (-9n) = 7 + n

So now we simply solve the equation:

n - (-9n) = 7 + n

n + 9n = 7 + n

10n = 7 + n

9n = 7

n = 7/9

Hence the missing number is 7/9.

Cheers.