Question

If 13 is added to a number and the sum is multiplied by 3, the result is 7 times the number decreased by 9. Find the number

Answer 1

Answer: 47/4

Explanation:

Convert the words into math:

The number = x

( 13 + x ) * 3 = 7 * x - 9

Expand:

39 + 3x = 7x - 9

Subtract 3x from both sides:

38 = 4x - 9

Add 9 to both sides:

47 = 4x

x = 47/4