Question

3. 3 times the difference of a number and 5 is 21.Solve.JE

Answer 1

Let x be the number that we want to find

3 the difference of x and 5 is 21. We can rewrite this in the form of a equation:

3(x - 5) = 21

3x - 15 = 21

3x = 21 + 15

3x = 36

x = 36/3

x = 12