Đáp án:
Giải thích các bước giải:
`a)`
`x + 3/16 = -5/24`
`-> x = -5/24 - 3/16`
`-> x = -19/48`
Vậy `x \in {-19/48}`
`b)`
`1/20-(x-8/5)=-(-1)/30`
`-> 1/20 - (x-8/5) = 1/30`
`-> x - 8/5 = 1/20 - 1/30`
`-> x - 8/5 = 1/60`
`-> x = 1/60 + 8/5`
`-> x = 97/60`
Vậy `x \in {97/60}`
`c)`
`-x = 1 + 9/2012`
`-> -x = 2021/2012`
`-> x = -2021/2012`
Vậy `x \in {-2021/2012}`
`d)`
`5 - (2/3+3 1/6+x)=3+(-5/9-11/8)`
`-> 5 - (2/3+19/6+x) = 3 + (-139/72)`
`-> 5 - (2/3 + 19/6 + x) = 77/22`
`-> 2/3 + 19/6 + x = 5 - 77/22`
`-> 2/3 + 19/6 + x = 283/72`
`-> 23/6 + x = 283/72`
`-> x = 283/72 - 23/6`
`-> x = 7/72`
Vậy `x \in {7/72}`
