Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(a,\)\(x+x+2x=164\)
\(\Rightarrow4x=164\)
\(\Rightarrow x=41\)
Bài 1 :
a , x = 675
b , x = 1764
c , x = 0
Bài 2 :
a , x = 3 , 2 , 1 , 0
b , x = 6 , 5 , 4 , 3 , 2 , 1 , 0
c , x = 3 , 4
Bài 1:Tìm x
a, x:5=27\(x\)5
x:5=135
x =135\(x\)5
x =675
b, x:7=36\(x\)7
x:7=252
x =252\(x\)7
x =1764
c,x\(x\)132=312 x (5-3-2)
x\(x\)132=312x0
x\(x\)132=0
x =0:132
x =0
3.Tính giá trị của biểu thức:
78 - 56 x 4 = -146
4.Tìm x:
x : 3 = 56
x = 56 x 3 = 168
42 - x = 34
x= 42 - 34
x = 8
\(\left(a\right)\overline{a3}-17=66\)
\(\overline{a3}=66+17=83\)
a = 8
\(\left(b\right)\overline{a42}+\overline{b5}+\overline{10c}=789\)
\(a\cdot100+40+2+b\cdot10+5+100+c=789\)
\(\overline{abc}+147=789\)
\(\overline{abc}=789-147=642\)
a = 6; b = 4; c = 2
\(\left(c\right)\overline{ab}+281=\overline{ab0}+2\)
\(281-2=\overline{ab0}-\overline{ab}\)
\(279=\overline{ab}\cdot9\)
\(\overline{ab}=\frac{279}{9}=31\)
a = 3; b = 1
\(\left(d\right)\overline{2ab2}=\overline{ab}\cdot11+1989\)
\(2002+\overline{ab0}=\overline{ab}\cdot11+1989\)
\(2002-1989=\overline{ab}\cdot11-\overline{ab0}\)
\(\overline{ab}=13\)
a = 1; b = 3
\(\left(e\right)\overline{ab}\cdot6=\overline{a0b}\)
\(\left(a\cdot10+b\right)\cdot6=a\cdot100+b\)
\(a\cdot60+b\cdot6=a\cdot100+b\)
\(b\cdot6-b=a\cdot100-a\cdot60\)
\(b\cdot5=a\cdot40\)
\(b=a\cdot8\)
Suy ra a = 1; b = 8
b) 6/5:x:5/4=10/15
6/5:x=10/15*5/4
6/5:x=5/6
x=6/5:5/6
x=36/25
403 – X : 2 = 56
x:2=347
x=694
245 – X x 7 = 70
x.7=175
x=25
( X – 3) : 5 = 34
x-3=170
x=173
55 + X : 3 = 100
x:3=45
x=135
153 – X x 9 = 252 : 2
153-x.9=126
x.9=27
x=3
( X + 27) x 7 = 300 – 48
(x+27).7=252
x+27=36
x=9
\(80-\left(x-23\right)=56\)
\(x-23=80-56\)
\(x-23=24\)
\(x=24+23\)
\(x=47\)
\(67-\left(x-30\right)=1\)
\(x-30=67-1\)
\(x-30=66\)
\(x=66+30\)
\(x=96\)
a) x + 26 = 32
x = 32 - 26
x = 6
b) 30 - x = 10
x = 30 - 10
x = 20
\(a,x+26=32\\ x=32-26\\ x=6\)
\(b,30-x=10\\ x=30-10\\ x=20\)
