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Mathematics, 03.07.2019 15:10 214578

In the equation \frac{2}{3}b+5=20-b , in the second step of the picture down below, why did \frac{2}{3} change to \frac{5}{3} ?


In the equation [tex]\frac{2}{3}b+5=20-b[/tex] , in the second step of the picture down below, why d

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In the equation [tex]\frac{2}{3}b+5=20-b[/tex] , in the second step of the picture down below, why d...
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