It looks like you're trying to solve an equation involving fractions or possibly performing operations with them. Let's clarify the equation you've provided.
If we interpret it as:
\[ -\frac{7}{1} + \frac{2}{1} b = \frac{7}{1} \]
We can simplify this equation step by step.
- Since \(\frac{7}{1} = 7\), we rewrite the equation as:
\[ -7 + 2b = 7 \]
- Next, add \(7\) to both sides of the equation:
\[ 2b = 7 + 7 \]
\[ 2b = 14 \]
- Now, divide both sides by \(2\):
\[ b = \frac{14}{2} \]
\[ b = 7 \]
So, the solution is:
\[ b = 7 \]
If you meant something different or if there are additional constraints, please provide that information!