I need help with this problem.
If (4/5)x - 19 =13, then what is the value of (3/8)x+4?
Thank you very much,
Jerry Cunningham
Well, one way to do it is to simply solve the equation for x:
$\displaystyle \frac{4}{5}x - 19 = 13$
$\displaystyle \frac{4}{5}x = 32$
$\displaystyle x = \frac{5}{4} \cdot 32 = 40$
Now plug this value of x into $\displaystyle \frac{3}{8}x + 4$
(There's probably a fancier way to do this, but this method always works.)
-Dan