5A : Tìm số nguyên x a) 35-x=16-(-2) b) x-2=(-7)-9 c) 15-x=11-(-2) d) x-1=(-2)-3 18/11/2021 Bởi Audrey 5A : Tìm số nguyên x a) 35-x=16-(-2) b) x-2=(-7)-9 c) 15-x=11-(-2) d) x-1=(-2)-3
a) $35 – x = 16 – ( -2 )$ $ 35 – x = 16 + 2 = 18$ $x = 35 – 18 = 17$ b) $x – 2 = ( -7 ) – 9$ $ x – 2 = -16$ $ x = -16 + 2 = -14$ c) $15 – x = 11 – ( – 2 )$ $15 – x = 11 + 2 =13$ $x= 15 – 13 = 2$ d) $ x – 1 = -2 – 3$ $x = -5$ $ x = -5 + 1 = -4$ Bình luận
Đáp án:+$\text{ a) x = 17 }$$\text{b) x = – 14 }$$\text{c )x = 2 }$ $\text{ d) x = -4 }$ Giải thích các bước giải: $\text{a) 35 – x = 16 – (-2) }$ $\text{35 – x = 18 }$ $\text{x = 35 – 18 }$ $\text{x = 17 }$ $\text{b) x – 2 = (-7) – 9 }$ $\text{ x – 2 = – 16 }$ $\text{ x = – 16 + 2 }$ $\text{ x = – 14 }$ $\text{c) 15 – x = 11- (-2) }$ $\text{c) 15 – x = 13 }$ $\text{x = 15 – 13 }$ $\text{x = 2 }$ $\text{x – 1 = ( -2 ) -3 }$ $\text{ x – 1 =- 5 }$ $\text{ x = -5 +1 }$ $\text{ x = -4 }$ Bình luận
a) $35 – x = 16 – ( -2 )$
$ 35 – x = 16 + 2 = 18$
$x = 35 – 18 = 17$
b) $x – 2 = ( -7 ) – 9$
$ x – 2 = -16$
$ x = -16 + 2 = -14$
c) $15 – x = 11 – ( – 2 )$
$15 – x = 11 + 2 =13$
$x= 15 – 13 = 2$
d) $ x – 1 = -2 – 3$
$x = -5$
$ x = -5 + 1 = -4$
Đáp án:+
$\text{ a) x = 17 }$
$\text{b) x = – 14 }$
$\text{c )x = 2 }$
$\text{ d) x = -4 }$
Giải thích các bước giải:
$\text{a) 35 – x = 16 – (-2) }$
$\text{35 – x = 18 }$
$\text{x = 35 – 18 }$
$\text{x = 17 }$
$\text{b) x – 2 = (-7) – 9 }$
$\text{ x – 2 = – 16 }$
$\text{ x = – 16 + 2 }$
$\text{ x = – 14 }$
$\text{c) 15 – x = 11- (-2) }$
$\text{c) 15 – x = 13 }$
$\text{x = 15 – 13 }$
$\text{x = 2 }$
$\text{x – 1 = ( -2 ) -3 }$
$\text{ x – 1 =- 5 }$
$\text{ x = -5 +1 }$
$\text{ x = -4 }$