Answer:
RT = 8
Step-by-step explanation:
Given S is between R and T , then
RS + ST = RT , substitute values
2x + 4 + 3x - 7 = 22 , that is
5x - 3 = 22 ( add 3 to both sides )
5x = 25 ( divide both sides by 5 )
x = 5
Thus
ST = 3x - 7 = 3(5) - 7 = 15 - 7 = 8
