Question

Qual o valor de X na expressão (5x/3) - (4x/7) + (3/7) = (25/21)​

Answer 1

    5x/3 - 4x/7 + 3/7 = 25/21 ⇔

⇔ 35x/21 - 12x/21 + 9/21 = 25/21 ⇔

⇔ 35x - 12x + 9 = 25 ⇔

⇔ 35x - 12x = 25 - 9 ⇔

⇔ 23x = 16 ⇔

⇔ x = 16/23