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3b) What is the length of segment ST?
3a) R, S, and T are collinear. S is between R and T.
If RS = 3x + 7, ST = 4x - 3, and RT = 5x + 12,
then find ST

Respuesta :

Answer:

ST=13

Step-by-step explanation:

3x + 7 +4x - 3= 5x + 12

7x+4=5x+12

2x+4=12

2x=8

x=4

plug 4 into x for ST