240/x -2400/3x =202400/x -2400/3x =20
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![240/x -2400/3x =202400/x -2400/3x =20](/uploads/image/z/3921278-14-8.jpg?t=240%2Fx+-2400%2F3x+%3D202400%2Fx+-2400%2F3x+%3D20)
240/x -2400/3x =202400/x -2400/3x =20
240/x -2400/3x =20
2400/x -2400/3x =20
240/x -2400/3x =202400/x -2400/3x =20
2400/x -2400/3x =20
2400/x -800/x =20
1600/x=20
x=1600÷20
x=80