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g: x:(-7)-6=-15
=>x:(-7)=-15+6=-9
=>\(x=\left(-9\right)\left(-7\right)=9\cdot7=63\)
h: \(x:12+\left(-12\right)=-37\)
=>\(x:12=\left(-37\right)-\left(-12\right)=-37+12=-25\)
=>\(x=-25\cdot12=-300\)
i: \(x:\left(-25\right)+81=85\)
=>\(x:\left(-25\right)=85-81=4\)
=>\(x=4\cdot\left(-25\right)=-100\)
k: \(\left(-31\right)\cdot x=-93\)
=>\(x=\dfrac{-93}{-31}=\dfrac{93}{31}\)
=>x=3
l: 5x+1=-4
=>5x=-4-1=-5
=>\(x=-\dfrac{5}{5}=-1\)
m: \(\left(-12\right)\cdot x+34=10\)
=>\(\left(-12\right)\cdot x=10-34=-24\)
=>12x=24
=>x=24/12=2
9 – 25 = (7-x) – (25 + 7)
9 + (-25) = 7 – x – 25 – 7
-16 = 7 – x – 25 – 7
X = 7 – 7 – 25 + 16
x = -25 + 16
x = -9
9 -25 = (7-x) - ( 25 +7)
- 16 = 7 -x - 32
x = 7 -32 +16
x =7 -16
x = - 9
a,11-(15+21)=x-(25-9)
11-15-21=x-25+9
-x=-25+9-11+15+21
-x=9
x=-9
b,9-25=(7-x)-(25+7)
-16=7-x-32
x=7-32+16
x=-9
9 - 25 = (7 - x) - ( 25 + 7)
-16 = 7 - x - 32
-16 = -25 - x
x = -25 - (-16)
x = -25 + 16
x = -9
Giải
9 – 25 = ( 7 – x ) – ( 25+7)
9 +( -25) = 7 – x – 25 – 7
-16 = 7 – x – 25 – 7
x = 7 – 7 – 25 +16
x = - 25 + 16
x = -9
a)2-x=17-(-5)
2-x=17+5
2-x=22
x=2-20
x=-20
b)x-12=-9-15
x-12=-24
x=(-24)+12
x=-12
c)11-(15+11)=x-(25-9)
11-26=x-16
-15=x-16
x=-15+16
x=1
d)x-25=(7-x)-(25+7)
x-25=(7-x)-32
2x-25=7-32
2x-25=-25
2x=(-25)+25
2x=0
x=0:2
x=0
tick cho mk nha bạn
a)2-x=17-(-5)
2-x=17+5
2-x=22
x=2-20
x=-20
b)x-12=-9-15
x-12=-24
x=(-24)+12
x=-12
c)11-(15+11)=x-(25-9)
11-26=x-16
-15=x-16
x=-15+16
x=1
d)x-25=(7-x)-(25+7)
x-25=(7-x)-32
2x-25=7-32
2x-25=-25
2x=(-25)+25
2x=0
x=0:2
x=0
a, 11 - ( 15 + 11 ) = x - ( 25 - 9 )
11-15-11=x-25+9
-15=x-16
x=1
b, 2 - x = 17 - ( - 5 )
2-x=22
x=-20
c, x - 12 = ( - 9 ) - 15
x-12=-24
x=-12
d, 9 - 25 = ( 7 - x ) - ( 25 + 7 )
(7-x)-32=-16
7-x=16
x=-9
#H
9 - 25 = (7 - x) - (25 + 7)
-16 = 7 - x - 32
7 - x - 32 = -16
7 - x = -16 + 32
7 - x = 16
x = 16 +7
x = 23
9 - 25 = 7 - x - 25 - 7
-16 = 7 - x - 32
<=> 7-x-32 = -16
7-x = -16 + 32 = 16
x = 7 - 16 = -9
x=-9
tk cho bạn ấy đi , đúng rùi đấy