To find an equation equivalent to \(2x + 3y = 5\) by multiplying the entire equation by 4, you can do the following:
\[ 4(2x + 3y) = 4 \times 5 \]
Now, distribute the 4 on the left side:
\[ 8x + 12y = 20 \]
So, the equation \(2x + 3y = 5\) is equivalent to \(8x + 12y = 20\).