Question 1179361
<br>
Let x be the number of additional feet added to the length.  Then the new area is 119 square feet:<br>
{{{7(12+x)=119}}}<br>
Solve using basic algebra....<br>
Or get some good mental exercise and solve the problem informally:
7 times what new length makes the new area 119 square feet?  Then find the difference between the new length and the current length....<br>