Question

S=a+(n-1)d,solve for d​

Answer 1

Answer:\frac{s-a}{n-1}

Step-by-step explanation:

formula, s=a+(n-1)d

1. get rid of the a on d's side by subtracting it from both sides.  

s=a+(n-1)d   becomes s-a=(n-1)d

2. get rid of (n-1) by dividing it from both sides. s-a=(n-1)d   becomes  

\frac{s-a}{n-1} =d