To rewrite the equation after subtracting \(10x\) from both sides, you start with the original equation:
\[ 60 + 20x = 90 + 10x \]
Now, subtract \(10x\) from both sides:
\[ 60 + 20x - 10x = 90 + 10x - 10x \]
This simplifies to:
\[ 60 + 10x = 90 \]
Now we have the equation rewritten to represent the remaining values:
\[ 60 + 10x = 90 \]