Answer:
x = 1
Step-by-step explanation:
These are congruent triangles
The single line is the same length in ABC as the single line in DEF
The double line is the same length in ABC as the double line in DEF
13x-12 is the same length as 7x-6
13x-12 = 7x-6
Subtract 7x from each side
13x-12 -7x =7x-6 -7x
6x-12 =-6
Add 12 to each side
6x-12+12 = -6+12
6x = 6
Divide each side by 6
6x/6 = 6/6
x = 6/6
x = 1
