A/ X+4/15=-3/15 b/ x-2/11=-5/11 c/ x -7/25+-1/5 d/ x=5/11+4/-9 e/ 5/9+x/-1=-1/3
2 câu trả lời
A/ `x+4/15=-3/15`
`x = -3/15 -4/15`
`x = -7/15`
Vậy `x = -7/15`
B/` x-2/11=-5/11 `
`x =-5/11 +2/11 `
`x = -3/11`
Vậy` x= -3/11`
C/ `x = -7/25+-1/5`
` x = -7/25+-5/25`
`x =-12/25`
Vậy `x = -12/25`
D/ `x=5/11+4/-9 `
` x = 45/99 + -44/99`
` x =1/99`
Vậy `x = 1/99`
E/ `5/9+x/-1=-1/3`
` x/-1=-1/3 -5/9`
` x/-1= -8/9 `
` x =-8/9 .(-1)`
`x = 8/9`
Vậy`x =8/9`
Chúc bạn học tốt!!
a) `x +` `\frac{4}{15} =` `\frac{-3}{15}`
`x = ` `\frac{-3}{15} - ` `\frac{4}{15}`
`x =` `\frac{-7}{15}`
b) `x -` `\frac{2}{11} =` `\frac{-5}{11}`
`x = ` `\frac{-5}{11} +` `\frac{2}{11}`
`x =` `\frac{-3}{11}`
c) `x =` `\frac{-7}{25} +` `\frac{-1}{5}`
`x =` `\frac{-7}{25} +` `\frac{-5}{25}`
`x =` `\frac{-12}{25}`
d) `x =` `\frac{5}{11} + ` `\frac{4}{-9}`
`x =` `\frac{45}{99} +` `\frac{-44}{99}`
`x =` `\frac{1}{99}`
e) `\frac{5}{9} + ` `\frac{x}{-1} =` `\frac{-1}{3}`
`\frac{x}{-1} =` `\frac{-1}{3} - ` `\frac{5}{9}`
`\frac{x}{-1} =` `\frac{-8}{9}`
`x . 9 = (-1) . (-8)`
`x . 9 = 8 `
`x = 8 : 9`
`x =` `\frac{8}{9}`