Answer: x = 7/10
Step-by-step explanation: First, we need to move all constants or variables other than x onto the other side of the equation. When a number crosses sides, its sign (- or +) changes to the opposite.
20x = 17 - 3
20x = 14
Now, we need to detach the 20 from the x. We can do this by dividing both sides of the equation by 20 (reversing the operation; the opposite of 20 · x is 20 · x ÷ 20).
20x ÷ 20 = 14 ÷ 20
x = 14/20
x = 7/10