Please help meeeeeeeeee

Answer:
x = 27
Step-by-step explanation:
Since l, m, and n are cut across by the two transversal lines, therefore, the transversal lines are cut off proportionally.
This implies that:
6/x = 10/45
Cross multiply
x*10 = 45*6
10x = 270
10x/10 = 270/10
x = 27