c) ( 7x -23 ) + 47 = -11 d) 32 – (5x – 18) = 95 e) 11 – ( 20 + 12 = x – (25 – 9) 21/10/2021 Bởi Reese c) ( 7x -23 ) + 47 = -11 d) 32 – (5x – 18) = 95 e) 11 – ( 20 + 12 = x – (25 – 9)
c)$ (7x-23 )+ 47= -11^{}$ (7x-23 ) = -11 – 47 (7x-23 ) = -58 7x = -58 + 23 7x = -35 x = -35 : 7 $ x = -5^{}$ Vậy x = -5 d) $32 – (5x – 18) = 95^{}$ (5x – 18) = 32 – 95 (5x – 18) = – 63 5x = -63 +18 5x = -45 x = -45 : 5 $x = -9^{}$ Vậy x = -9 e) $11 – ( 20 + 12 = x – (25 – 9)^{}$ 11 – 32 = x – (25- 9) – 21 = x – 16 => x -16 = -21 x = -21 + 16 $ x = -5^{}$ Vậy x = -5 Bình luận
Đáp án: Giải thích các bước giải: C) (7x-23 )+ 47= -11 (7x-23 ) = -11 – 47 (7x-23 ) = -58 7x = -58 + 23 7x = -35 x = -35 : 7 x = -5 d) 32 – (5x – 18) = 95 (5x – 18) = 32 – 95 (5x – 18) = – 63 5x = -63 +18 5x = -45 x = -45 : 5 x = -9 e) 11 – ( 20 + 12 = x – (25 – 9) 11 – 32 = x – (25- 9) – 2 1 = x – 16 => x -16 = -21 x = -21 + 16 x = -5 Bình luận
c)$ (7x-23 )+ 47= -11^{}$
(7x-23 ) = -11 – 47
(7x-23 ) = -58
7x = -58 + 23
7x = -35
x = -35 : 7
$ x = -5^{}$
Vậy x = -5
d) $32 – (5x – 18) = 95^{}$
(5x – 18) = 32 – 95
(5x – 18) = – 63
5x = -63 +18
5x = -45
x = -45 : 5
$x = -9^{}$
Vậy x = -9
e) $11 – ( 20 + 12 = x – (25 – 9)^{}$
11 – 32 = x – (25- 9)
– 21 = x – 16
=> x -16 = -21
x = -21 + 16
$ x = -5^{}$
Vậy x = -5
Đáp án:
Giải thích các bước giải:
C) (7x-23 )+ 47= -11
(7x-23 ) = -11 – 47
(7x-23 ) = -58
7x = -58 + 23
7x = -35
x = -35 : 7
x = -5
d) 32 – (5x – 18) = 95
(5x – 18) = 32 – 95
(5x – 18) = – 63
5x = -63 +18
5x = -45
x = -45 : 5
x = -9
e) 11 – ( 20 + 12 = x – (25 – 9)
11 – 32 = x – (25- 9)
– 2 1 = x – 16
=> x -16 = -21
x = -21 + 16
x = -5