Since the 2 fractions have the common denominator 4,
(3x - 1)/4 + (x + 6)/4 = (3x - 1 + x + 6) / 4 = (4x + 5) /
4
Now, separating the numerator to form 2 fractions using the
common denominator 4 (doing the reverse of the first step), you can derive
the expression 4x/4 + 5/4, or x + 5/4. The original expression, which
can be rendered into x + 5/4, is therefore 5/4, or 1.25 more than x.