Toán 4x+3phan5 – 6x – 2 phan 7 = 5x+4 phần 3 + 3 23/11/2021 By Harper 4x+3phan5 – 6x – 2 phan 7 = 5x+4 phần 3 + 3
Đáp án: $\dfrac{4x+3}{5}$ $-$ $\dfrac{6x – 2}{7}$ $=$ $\dfrac{5x+4}{3}$ $+ 3$ $⇔ 21(4x+3)-15(6x-2)=35(5x+4)+105.3$ $⇔ 84x+63-90x+30=175x+140+315$ $⇔ 84x-90x-175x=140+315-63-30$ $⇔ -181x=362$ $⇔ x=-2$ Vậy $S=${$-2$} BẠN THAM KHẢO NHA!!! Trả lời
$\frac{4x+3}{5}-\frac{6x-2}{7}= \frac{5x+4}{3}+ 3$ $\Leftrightarrow \frac{28x+21-30x+10}{35}= \frac{5x+4+9}{3}$ $\Leftrightarrow \frac{-2x+31}{35}= \frac{5x+13}{3}$ $\Rightarrow 35(5x+13)= 3(-2x+31)$ $\Leftrightarrow 76x= -392$ $\Leftrightarrow x= -\frac{98}{19}$ Trả lời
Đáp án:
$\dfrac{4x+3}{5}$ $-$ $\dfrac{6x – 2}{7}$ $=$ $\dfrac{5x+4}{3}$ $+ 3$
$⇔ 21(4x+3)-15(6x-2)=35(5x+4)+105.3$
$⇔ 84x+63-90x+30=175x+140+315$
$⇔ 84x-90x-175x=140+315-63-30$
$⇔ -181x=362$
$⇔ x=-2$
Vậy $S=${$-2$}
BẠN THAM KHẢO NHA!!!
$\frac{4x+3}{5}-\frac{6x-2}{7}= \frac{5x+4}{3}+ 3$
$\Leftrightarrow \frac{28x+21-30x+10}{35}= \frac{5x+4+9}{3}$
$\Leftrightarrow \frac{-2x+31}{35}= \frac{5x+13}{3}$
$\Rightarrow 35(5x+13)= 3(-2x+31)$
$\Leftrightarrow 76x= -392$
$\Leftrightarrow x= -\frac{98}{19}$