Toán tìm x biết a) x: 3 1/15 = 1 1/12 b) 3/4 x + 2/5 x =1 26/11/2021 By Ivy tìm x biết a) x: 3 1/15 = 1 1/12 b) 3/4 x + 2/5 x =1
`x/ 3 .1/15 = 1 .1/12` `⇔x/45=1/12` `⇔x=15/4` `3/4 x + 2/5 x =1` `⇔23x/20=1` `⇔23x=20` `⇔x=20/23` Trả lời
a) x÷31/15=11/12 x=11/12×31/15 x=381/180 b) 3/4x+2/5x=1 (3/4+2/5)x=1 23/20x=1 x=1÷23/20 x=20/23 CHÚC BẠN HỌC TỐT!!!???????????????????????? Trả lời
`x/ 3 .1/15 = 1 .1/12`
`⇔x/45=1/12`
`⇔x=15/4`
`3/4 x + 2/5 x =1`
`⇔23x/20=1`
`⇔23x=20`
`⇔x=20/23`
a)
x÷31/15=11/12
x=11/12×31/15
x=381/180
b)
3/4x+2/5x=1
(3/4+2/5)x=1
23/20x=1
x=1÷23/20
x=20/23
CHÚC BẠN HỌC TỐT!!!????????????????????????