Question 324925
1.{{{7r - 8s =8}}}
2.{{{8r + 7s =106}}}
From eq. 1,
{{{7r-8s=8}}}
{{{7r=8s+8}}}
{{{r=(8s+8)/7}}}
Substitute into eq. 2,
{{{(8(8s+8))/7+7s=106}}}
{{{8(8s+8)+49s=742}}}
{{{64s+64+49s=742}}}
{{{113s=678}}}
{{{highlight(s=6)}}}
.
.
.
Then from above,
{{{r=(8(6)+8)/7=56/7}}}
{{{highlight(r=8)}}}