Question

$\frac{2 \times - 1}{4} - \frac{ \times - 3}{5} = \frac{ \times }{ 3}$

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Answer 1

Resposta:

(2x-1)/4-(x-3)/5 =x/3

multiplique tudo por 4*5*3

4*5*3*(2x-1)/4-4*5*3*(x-3)/5 =4*5*3*x/3

5*3*(2x-1)-4*3*(x-3) =4*5*x

30x-15-12x+36=20x

30x-12x-20x=15-36

-2x=-21

x=21/2