Answer:
-7
Step-by-step explanation:
use X to represent the unknown number
(x-16) -6=-138
-138/6= -23
(x-16)=-23
add 16 to both sides
x= -7
Julio's number is -7
you can also plug it back into the formula to prove it is right
Your goal is to have x by itself
Send st to other side
rx= r+st
Divide by r so x stays alone
X=(r+st)/r
Which is also equal to
X=r/r+st/r
X= 1+st/r
3.2 is the Length of y 7.5 is the length of z and the length of x is 12.5
