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a) 2x-35=15
2x=15+35
2x=50
x=50:2
x=25
b) 3x+17=2
3x=2-17
3x=-15
x=-15:3
x=-5
c) /x-1/=0
x-1=0
x=0+1
x=1
a)2x-35=15
2x=15+35
2x=50
x=50:2
x=25
b)3x+17=2
3x=2-17
3x=-15
x=-15:3
x=-5
c)|x-1|=0
=>x-1=0=>x=0-1
=>x=-1
a)2x-35=15
2x=15+35
2x=50
x=50:2
x=25
b)3x+17=2
3x=2-17
3x=-15
x=-15:3
x=-5
c)|x-1|=0
x-1=0
x=0+1
x=1
\(2x-35=15\)
\(\Rightarrow2x=15+35\)
\(\Rightarrow2x=50\)
\(\Rightarrow x=\frac{50}{2}=25\)
Vậy : \(x=25\)
\(3x+17=2\)
\(\Rightarrow3x=2-17\)
\(\Rightarrow3x=-15\)
\(\Rightarrow x=-\frac{15}{3}=-5\)
Vậy: \(x=-5\)
\(\left|x-1\right|=0\)
\(\Rightarrow x-1=0\)
\(\Rightarrow x=0+1=1\)
a)2x-35=15
2x =15+35
2x =50
x =50:2
x =25
b)3x +17=2
3x =17-2
3x =15
x =15:3
x =5
c)
Tìm số nguyên x, biết:
1) -16 + 23 + x = - 16
7+x=-16
x=-16-7
x=-23
2) 2x – 35 = 15
2x=15+35
2x=50
x=50:2
x=25
3) 3x + 17 = 12
3x=12-17
3x=-5
x=-5/3
4) (2x – 5) + 17 = 6
2x-5=6-17
2x-5=-11
2x=-11+5
2x=-6
x=-6:2
x=-3
5) 10 – 2(4 – 3x) = -4
2(4-3x)=10-(-4)
2(4-3x)=14
4-3x=14:2
4-3x=7
3x=4-7
3x=-3
x=-3:3
x=-1
6) - 12 + 3(-x + 7) = -18
3(-x+7)=-18-(-12)
3(x+7)=-6
x+7=-6:3
x+7=-2
x=-2-7
x=-9
Bài 1:Tính
a) = -343 . 16
= -5488
b) = 625 . 16
= 10000
Bài 2:
a) 2x = 15 + 35
2x = 50
x = 50 : 2
x = 25
b) 3x = 2 - 17
3x = -15
x = -15 : 3
x = -5
c) x - 1 = 0
x = 0 + 1
x = 1
Bài 2 :
a) 2x - 35 = 15
2x = 15 + 35
2x = 50
x = 50 : 2
x = 25
b ) tương tự câu a)
c) | x - 1 | = 0
=> x - 1 = 0
x = 0 + 1
x = 1
a) 2x-35=15
2x =15+35
2x =50
x=50:2
x= 25
b) 3x+17=2
3x = 2-17
3x=-15
x=-15:3
x=-5
c) |x-1|=0
x-1=0
x=0+1
x=1
tik nha
a, - ( x + 84 ) + 213 = -16
=> - ( x + 84 ) = -16 - 213
=> - ( x + 84 ) =-229
=> x + 84 = 229
=> x = 145
b. x + ( -35 ) = 18
=> x = 18 - ( -35 )
=> x = 18 + 35
=> x = 53
c. -2x - ( - 17 ) = 15
=> -2x = 15 + ( -17)
=> -2x = -2
=> x = 1
\(a,-\left(x+84\right)+213=-16\)
\(x+84=213+16\)
\(x+84=229\)
\(x=229-84\)
\(x=145\)
\(b,x+\left(-35\right)=18\)
\(x=18+35\)
\(x=53\)
\(c,-2x-\left(-17\right)=15\)
\(-2x+17=15\)
\(2x=17-15\)
\(2x=2\)
\(x=1\)
a, 2x -35=15
2x =15+35
2x =50
x =50:2
x =25 vậy x =25
b,3x +17=2
3x =2-17
3x =-15
x =-15:3
x =-5 vậy x=-5
A} 2x-35=15
2x=15+35
2x=50
x=50x1:2
x=25
B]-3x=2+17
-3x=19
x=19-1:3
x=6