1/2×x+3/5×(x-2)=3, chuyển vế như nào vậy? 12/08/2021 Bởi Audrey 1/2×x+3/5×(x-2)=3, chuyển vế như nào vậy?
Mk làm luôn $\frac{1}{2}x$+$\frac{3}{5}$x($x-2$)=$3$ $\frac{1}{2}x$+$\frac{3}{5}x$-$\frac{6}{5}$=$3$ $x$( $\frac{1}{2}$+$\frac{3}{5}$)=$3$+$\frac{6}{5}$ $x$x$\frac{11}{10}$=$\frac{21}{5}$ $x$ =$\frac{21}{5}$:$\frac{11}{10}$ $x$=$\frac{42}{11}$ Bình luận
Đáp án: `1/2x + 3/5 . (x – 2) = 3` `-> 1/2x + 3/5x – 6/5 = 3` `-> (1/2 + 3/5)x – 6/5 = 3` `-> 11/10x – 6/5 = 3` `-> 11/10x = 3 + 6/5` `-> 11/10x = 21/5` `-> x = 21/5 : 11/10` `-> x = 42/11` Vậy `x = 42/11` Bình luận
Mk làm luôn
$\frac{1}{2}x$+$\frac{3}{5}$x($x-2$)=$3$
$\frac{1}{2}x$+$\frac{3}{5}x$-$\frac{6}{5}$=$3$
$x$( $\frac{1}{2}$+$\frac{3}{5}$)=$3$+$\frac{6}{5}$
$x$x$\frac{11}{10}$=$\frac{21}{5}$
$x$ =$\frac{21}{5}$:$\frac{11}{10}$
$x$=$\frac{42}{11}$
Đáp án:
`1/2x + 3/5 . (x – 2) = 3`
`-> 1/2x + 3/5x – 6/5 = 3`
`-> (1/2 + 3/5)x – 6/5 = 3`
`-> 11/10x – 6/5 = 3`
`-> 11/10x = 3 + 6/5`
`-> 11/10x = 21/5`
`-> x = 21/5 : 11/10`
`-> x = 42/11`
Vậy `x = 42/11`