The perimeter is 26 bc x=5 so 5+2 is 7 the opposite side is congruent which gives you 7 again and then 5+1 is 6 so 7+7+6+6=26
The equation is 61 bc x=3 so
7x3 is 21
2x3 is 6
21-6 is 15
8+6 is 14
Reduce the fraction by 3
That leaves you with 5+4x14
4x14 is 56
56+5 is 61
