Answer:
[tex]x= 6[/tex]
Step-by-step explanation:
RT = RS + ST
[tex]48=5x+3x[/tex]
[tex]48=8x[/tex]
Swap sides:
[tex]8x=48[/tex]
Divide both sides by 8:
[tex]\frac{8x}{8} =\frac{48}{8}[/tex]
[tex]x=6[/tex]
