420+65.4=(x+175):5+30
x-4867=(175.2050.70):25+24
420+65.4=(x+175):5+30
(32.15):2=(x+70):14-40
x - 4867 = (175.2050.70):25 + 24
x - 4867 = 251125:25 + 24
x - 4867 = 1004500 +24
x = 1004500 + 24 + 4867
x = 1009391
Tìm x biết
a)420+65.4=(x+175):5+30
b)x-4867=(175.2050.70):25+24
a) 420 + 65.4 = (x+175):5+30 b) x - 4867 = (175.2050.70):25+23
(x+175):5+30 = 420 + 65.4 x - 4867 = 1004523
(x+175):5+30 = 680 x = 999656
(x+175):5 = 650
x+175 = 3250
x = 3075
a) 420 + 65.4 = ( x + 175 ) : 5 + 30
420 + 260 = ( x + 175 ) : 5 + 30
680 = ( x + 175 ) : 5 + 30
680 - 30 = ( x + 175 ) : 5
650 = ( x + 175 ) : 5
650 . 5 = x + 175
3250 = x + 175
x = 3250 - 175
x = 3075
BÀI 5: Tim x biết:
a) 3636:(12x-91) =36
b) (x : 23+45).67=8911
c) 420+65.4 =(x+175):5+30
d) (32.15):2=(x+70):14-10
e)x-4867=(175.2-50.70):25+23
a) 3636:(12x-91) =36
12x-91 = 3636:36
12x-91=101
12x=101+91
12x=192
x=192:12
x=16
b) (x : 23+45).67=8911
(x : 23+45)=8911:67
(x : 23+45)=133
x:23=133-45
x:23=88
x=88.23
x=2024
c) 420+65.4 =(x+175):5+30
420+260=(x+175):5+30
680=(x+175):5+30
(x+175):5=680-30
(x+175):5=650
(x+175)=650x5
(x+175)=3250
x=3250-175
x=3075
d) (32.15):2=(x+70):14-10
480:2=(x+70):14-10
240=(x+70):14-10
(x+70):14=240+10
(x+70):14=250
(x+70)=250.14
(x+70)=3500
x=3500-70
x=3430
e)x-4867=(175.2-50.70):25+23
x-4867=(350-3500):25+23
x-4867=-3150:25+23
x-4867=-126+23
x-4867=-103
x=-103+4867
x=4764
BÀI 5: Tim x biết:
a) 3636:(12x-91) =36
b) (x : 23+45).67=8911
c) 420+65.4 =(x+175):5+30
d) (32.15):2=(x+70):14-10
e)x-4867=(175.2-50.70):25+23
Tìm x, biết
a) 575 – (6X + 70) = 445
b) (32.15) : 2 = (X +70) : 14 – 40
c) (X – 15) -75 = 0 d) 420 + 65.4 = (X + 175):5 +30
e) X – 4867 = (175.2050.70) : 25 + 23 f) [(X + 32) -17].2 = 42
g) 96 – 3.(X+1)=42 h) 165 – 19.(35 : X + 3) = 13
\(a,\Rightarrow6x+70=130\Rightarrow6x=60\Rightarrow x=10\\ b,\Rightarrow240=\left(x+70\right):14-40\\ \Rightarrow\left(x+70\right):14=280\\ \Rightarrow x+70=3920\Rightarrow x=3850\\ c,\Rightarrow x-15=75\Rightarrow x=90\\ d,\Rightarrow\left(x+175\right):5=680-30=650\\ \Rightarrow x+175=3250\Rightarrow x=3075\\ e,\Rightarrow x-4867=1004523\Rightarrow x=1009390\\ f,\Rightarrow x+32-17=24\Rightarrow x=9\\ g,\Rightarrow3\left(x+1\right)=54\Rightarrow x+1=18\Rightarrow x=17\\ h,\Rightarrow19\left(35:x+3\right)=152\\ \Rightarrow35:x+3=8\Rightarrow35:x=11\Rightarrow x=\dfrac{35}{11}\)
B1 : Tìm x
a. ( 32.15) : 2 = (x + 70)+ 14 - 40
b. 420 + 65.4 = (x+ 175) : 5 + 30
c. x - 4867 = (175 . 2050 .70) :25 .23
NHỚ VIẾT CÁCH LÀM BÀI VÀ KẾT QUẢ NHÉ !
B2:
a.53.39 + 47.39 - 23.21 - 47.21
b.2.53.12 + 4.6.87 - 3.8.40
c. 5.7.77 - 7.60 + 49.25 - 15.42
NHỚ VIẾT CÁCH LÀM BÀI VÀ KẾT QUẢ NHÉ !
( X + 175 ) : 5 + 30 = 420 + 65 x 4
( X + 175 ) : 5 + 30 =420 + 65 x 4
( X + 175 ) : 5 + 30 = 680
( X + 175 ) : 5 = 680 - 30 = 650
( X + 175 ) = 650 x 5 = 3250
X = 3250 - 175 = 3075
( X + 175 ) : 5 + 30 = 420 + 65 x 4
( X + 175 ) : 5 + 30 = 420 + 260
( X + 175 ) : 5 + 30 = 680
( X + 175 ) : 5=680-30
( X + 175 ) : 5=650
X + 175=650x5
X + 175=3250
X=3250-175
X=3075
420 + 65 × 4 = (x + 175) ÷ 5 + 30
420 + 65 x 4 = ( x + 175 ) : 5 + 30
( x + 175 ) : 5 + 30 = 420 + 65 x 4
( x + 175 ) : 5 + 30 = 420 + 260
( x + 175 ) : 5 + 30 = 680
( x + 175 ) : 5 = 680 - 30
( x + 175 ) : 5 = 650
x + 175 = 650 x 5
x + 175 = 3250
x = 3250 - 175
x = 3075
420+65*4=(x+175)/5+30