help me:
1,5 – ( $\frac{3}{5}$X + 70% ) = -2$\frac{1}{2}$
(tìm X nha)
help me: 1,5 – ( $\frac{3}{5}$X + 70% ) = -2$\frac{1}{2}$ (tìm X nha)
By Amara
By Amara
help me:
1,5 – ( $\frac{3}{5}$X + 70% ) = -2$\frac{1}{2}$
(tìm X nha)
Đáp án: `x=11/2`
Giải thích các bước giải:
`1,5-(3/5*x+70%)=-5/2`
`=>3/5*x+7/10=1,5-(-5/2)`
`=>3/5*x+7/10=4`
`=>3/5*x=4-7/10`
`=>3/5*x=33/10`
`=> x=33/10:3/5`
`=>x=11/2`
`1,5 – ( 3/5 x + 70% ) = – 2 1/2`
`⇔ 3/2 – ( 3/5 x + 7/10 ) = ( – 5 )/2`
`⇔ 3/5 x + 7/10 = 3/2 – ( – 5 )/2`
`⇔ 3/5 x + 7/10 = 4`
`⇔ 3/5 x = 4 – 7/10`
`⇔ 3/5 x = 33/10`
`⇔ x = 33/10 : 3/5`
`⇔ x = 11/2`
Vậy , `x = 11/2 .`