The sum of 5 times a number and 8 is 7?

Answer 1

x = the number we multiply it by itself 5 times

5 x + 8 = 7 , subtract 8 from both sides

5 x = -1 , divide both sides by 5

x = -1/5

Check the answer:

5 (-1/5) + 8 = -1 + 8 = 7