Answer
\[B=2A-C\]
Work Step by Step
An expression can be solved for a variable by performing various mathematical operations to isolate a specified variable on one side of the expression.
The equation can be solved for \[B\] as follows:
\[A=\frac{B+C}{2}\]
Multiply both sides of the expression by \[2\]. This gives,
\[\begin{align}
& 2A=2\times \frac{B+C}{2} \\
& 2A=B+C \\
\end{align}\]
Subtract \[C\] from both sides of the expression which gives,
\[\begin{align}
& 2A-C=B+C-C \\
& 2A-C=B \\
\end{align}\]
