Answer:
Step-by-step explanation:
We must find the common denominator. It's 8, because 8 = 2 · 4.
[tex]\dfrac{7}{8}x-\dffrac{1}{2}x=\dfrac{7}{8}x-\dfrac{1\cdot4}{2\cdot4}x=\dfrac{7}{8}x-\dfrac{4}{8}x=\dfrac{7-4}{8}x=\boxed{\dfrac{3}{8}x}[/tex]
