Answer:
The value of x is 1.
Step-by-step explanation:
Given that S is the midpoint of RT so we can assume that RS is equal to ST. Next, we have to compare it :
[tex]RS = ST[/tex]
[tex]7x - 3 = 3x + 1[/tex]
[tex]7x - 3x = 1 + 3[/tex]
[tex]4x = 4[/tex]
[tex]x = 1[/tex]
