I don’t understand how show how to do the equation 21x-3=20x! Please help me by helping me identify what to add/remove from both sides of the equation.

Question

in my class we need to show how to solve the problem. I don’t know how to solve with 2 coefficients on either side of the equation and one constant. Thanks!

Answer 1

21x-3=20x

Your goal is to isolate x one one side of the equation, all by itself:

21x-3=20x

Subtract 20x from each side of the equation:

x - 3 = 0

Add 3 to each side of the equation:

x = 3

You are done!