Answer:
x=12
Step-by-step explanation:
Because they are similar triangles you can set up proportions. 12/18=8/x Then you solve that and get 12.
25 in total what do you mean
Answer:
x<-2
Step-by-step explanation:
You first subtract 4 from both sides. Then you divide both sides by -8 (note: when you multiply or divide by a negative the sign flips. Then you get your answer