Respuesta :
3m+21=6m
=>21=6m-3m
=>21=3m
=>7=m
Therefore option A is the answer
=>21=6m-3m
=>21=3m
=>7=m
Therefore option A is the answer
Here triangles LRU and LAU are congruent
So side RU=AU
3m+21=6m
subtracting 3m from both sides
21=6m-3m
3m=21
dividing both sides by 3
m=21/3 = 7
Answer is A. m=7