Answer:
10.6
Step-by-step explanation:
A rhombus has equal length sides
6x-11 = 25 -4x
Add 4x to each side
6x-11+4x = 25-4x+4x
10x-11 = 25
Add 11 to each side
10x +11-11 = 25 +11
10x = 36
Divide by 10
10x/10 = 36/10
x = 3.6
Now we need to find the length of a side (since they are equal)
6x-11
6(3.6) -11
21.6-11
10.6
