5/24-36/χ=1/12

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5/24-36/χ=1/125/24-36/χ=1/125/24-36/χ=1/125/24-1/12=36/χ3/24=36/χx=36×24÷3x=288

5/24-36/χ=1/12
5/24-36/χ=1/12

5/24-36/χ=1/12
5/24-1/12=36/χ
3/24=36/χ
x=36×24÷3
x=288