Question 406103
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Hi
Example A: 2n + 3 = 13  |two-step 
Example B: n + 3 = 13   |one-step (subtracting 3 from both sides) n = 10
Likeness: both involve isolating the variable on one side of the equation
Difference: A second step is necessary in the two-step to accomplish this.
for example:
2n + 3 = 13 
  2n = 10  |Step one, subtracting 3 from both sides
   n = 5   |Step two, dividing both sides by 2