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

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

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