To solve the equation above, we will follow the steps below;
Subtract 1 from both-side of the equation
5x + 1 - 1 = 20 -1
5x = 19
Divide both-side of the equation by 5
=
(On the left-hand side of the equation, 5 at the numerator will cancel-out 5 at the denominator leaving us with just x, while on the right-hand side of the equation 19 will be divided by 5)
I’m not sure what happened while you were writing this, but if I’m reading it right, “My” has 18 books. If “My” has 3 times as many as 6, that also means 3 times 6, which is 18.