Question 1199651
The sum of the first four terms of a linear sequence A.p is 26 
<pre>Let a = first term and d = common difference

{{{a+(a+d)+(a+2d)+(a+3d)=26}}}
{{{4a+6d=26}}}
{{{2a+3d=13}}}</pre>and that of the next four term is 74.

{{{(a+4d)+(a+5d)+(a+6d)+(a+7d)=74)}}}
{{{4a+22d=74}}}
{{{2a+11d=37}}}</pre>

find the value of the first term ,the common difference<pre>Solve the system:

{{{system(2a+3d=13, 2a+11d=37)}}}

Edwin</pre>