[tex]
\dfrac{2x}{3}+1=\dfrac{7x}{15}+3 \\
\dfrac{2x}{3}-\dfrac{7x}{15}=4 \\
\dfrac{2x\cdot15-7x\cdot3}{3\cdot15}=4 \\
\dfrac{30x-21x}{45}=4 \\
\dfrac{9x}{45}=4 \\
\dfrac{x}{5}=4 \\
\boxed{x=20}
[/tex]
Hope this helps.
