Question 1188493

The 20th term is 26 and the common difference is -5. Find the 1st term and 15th term.
<pre> <b><font color = blue><font size  = 4>1<sup>st</sup> term: 121</font></font></b>
<b><font color = blue><font size  = 4>15<sup>th</sup> term: 51</font></font></b>