( x-50000) - 225000 = 5/7(x-245000) Ko làm tắt tìm x

Giải thích các bước giải:

$(x-50000)-225000=\dfrac{5}{7}(x-245000)$

$⇔x-50000-225000=\dfrac{5}{7}(x-245000)$

$⇔x-275000=\dfrac{5}{7}(x-245000)$

$⇔\dfrac{x-275000}{x-245000}=\dfrac{5}{7}(x-245000):(x-245000)$

$⇔\dfrac{x-275000}{x-245000}=\dfrac{5}{7}$

$⇔7(x-275000)=5(x-245000)$

$⇔7x-1925000=5x-1225000$

$⇔7x-5x=1925000-1225000$

$⇔2x=700000$

$⇔x=\dfrac{700000}{2}$

$⇔x=350000$

Vậy $x=350000.$