3 (x – 1/2) – 5 (x + 3/5) = -x + 1/5 Giúp mềnh ik các thiên tài 12/10/2021 Bởi Valerie 3 (x – 1/2) – 5 (x + 3/5) = -x + 1/5 Giúp mềnh ik các thiên tài
Đáp án: $\text{ 3(x-$\dfrac{1}{2}$) – 5(x+$\dfrac{3}{5}$) = -x + $\dfrac{1}{5}$ }$ $\text{<=> 3x – $\dfrac{3}{2}$ – 5x -3 = -x + $\dfrac{1}{5}$ }$ $\text{<=> 3x -5x +x = $\dfrac{1}{5}$ + $\dfrac{3}{2}$ + 3 }$ $\text{<=> -x = $\dfrac{47}{10}$ }$ $\text{<=> x= $\dfrac{-47}{10}$ }$ $\text{Vậy x= $\dfrac{-47}{10}$ }$ Bình luận
Đáp án:
$\text{ 3(x-$\dfrac{1}{2}$) – 5(x+$\dfrac{3}{5}$) = -x + $\dfrac{1}{5}$ }$
$\text{<=> 3x – $\dfrac{3}{2}$ – 5x -3 = -x + $\dfrac{1}{5}$ }$
$\text{<=> 3x -5x +x = $\dfrac{1}{5}$ + $\dfrac{3}{2}$ + 3 }$
$\text{<=> -x = $\dfrac{47}{10}$ }$
$\text{<=> x= $\dfrac{-47}{10}$ }$
$\text{Vậy x= $\dfrac{-47}{10}$ }$