Answer:
See below.
Step-by-step explanation:
So, from the figure, we can see that US is the combined length of UT and TS. In other words:
[tex]UT+TS=US[/tex]
We are given their equations. Substitute them:
[tex](x-3)+(12)=(3x-11)[/tex]
And this is our answer to 4.
Now, solve for x. Add on the left:
[tex]x+9=3x-11[/tex]
Subtract -3x from both sides:
[tex]-2x+9=-11[/tex]
Subtract 9 from both sides:
[tex]-2x=-20[/tex]
Divide both sides by -2:
[tex]x=10[/tex]
So, for 5, the answer is 10.
And we're done!
