Tìm x
7( x -14 ) + 35 = 25 + 279 : 3
Tìm x
7 ( x - 14 ) + 35 = 25 + 279 : 3
Tìm x
7 . ( x - 14 ) + 35 = 25 + 279 : 9
7 . (x-14)+35= 25+279:9
7 . (x-14)+35= 25+31
7 . (x-14)+35= 56
7 . (x-14)= 56-35
7 . (x-14)= 21
x-14= 21:7
x-14= 3
x= 14+3
x= 17
Vậy x = 17
7 . (x - 14 ) + 35 = 25 + 279 :9
7 . (x - 14 ) + 35 = 25 + 31
7 . (x - 14 ) + 35 = 56
7 . (x - 14 ) = 56 -35
7 . (x - 14 ) = 21
(x - 14 ) = 21 . 7
(x - 14 ) = 147
x = 147 + 14
x = 161
chúc bạn học tốt !
tìm x biết 7.(x-14)+35=25+279:9
7(x-14)+35=25+279/9
7(x-14)+35=25+31
7(x-14)+35=56
7(x-14)=56-35
7(x-14)=21
x-14=21/7
x-14=3
x=3+14
x=17
Bài 1: Tìm x, biết:
a) 24 . x - 32 . x = 145 - 255 / 51
b) 580 / ( x - 24 ) = 329 - 150 . 2
c) 7. ( x - 14 ) + 35 = 25 + 279 / 9
thanks
a) \(2^4.x-3^2.x=145-\frac{255}{51}\Rightarrow x.\left(2^4-3^2\right)=145-5\)
\(\Rightarrow7.x=140\Rightarrow x=20\)
b) \(\frac{580}{x-24}=329-150.2\Rightarrow\frac{580}{x-24}=329-300\Rightarrow\frac{580}{x-24}=29\Rightarrow x-24=20\)
\(\Rightarrow x=44\)
c) \(7.\left(x-14\right)+35=25+\frac{279}{9}\Rightarrow7.\left(x-14\right)=25+31-35\)
\(\Rightarrow7.\left(x-14\right)=21\Rightarrow x-14=3\Rightarrow x=17\)
a) 580:(x-24)=329-150.21
b)7.(7-14)+35=25+279:9
a) 580 : ( x - 24 ) = 329 - 150 . 21
=> 580 : ( x - 24 ) = 329 - 150 . 2
=> 580 : ( x - 24 ) = 329 - 300
=> 580 : ( x - 24 ) = 29
=> x - 24 = 20
=> x = 20 + 24
=> x = 44
Vậy x = 44
mk nha các bạn !!!
=> 580 : ( x - 24 ) = 329 - 150 . 2
=> 580 : ( x - 24 ) = 329 - 300
=> 580 : ( x - 24 ) = 29
=> x - 24 = 20
=> x = 20 + 24
=> x = 44
Vậy x = 44
Tìm x ,biết :
7 . ( x - 14 ) + 35 = 279 : 9
\(7.\left(x-14\right)+35=279:9\)
\(7.\left(x-14\right)+35=31\)
\(7.\left(x-14\right)=31-35\)
\(7.\left(x-14\right)=-4\)
\(\left(x-14\right)=-4:7\)
\(\left(x-14\right)=-\frac{4}{7}\)
\(x=-\frac{4}{7}+14\)
\(=\frac{94}{7}\)
7. (x - 14) + 35 = 279 : 9
7. (x-14) + 35 = 31
7.(x-14) = 31-35
7. (x - 14) = -4
x - 14 = -4 : 7
x - 14 = - 0,6
x = -0,6 + 14
x = 13,4
7 . ( x - 14 ) + 35 = 279 : 9
7 . ( x - 14 ) + 35 = 31
7 . ( x - 14 ) = 31 - 35
7 . ( x - 14 ) = -4
x - 14 = - 4 : 7
x - 14 = \(\frac{-4}{7}\)
x = \(\frac{-4}{7}+14\)
x = \(\frac{94}{7}\)
Bài 1: Tìm x
a) 7x + 2x = 918
b) 16 . x - 9 . x = 145 - 225 : 51
c) 3. ( x - 2 ) + 150 = 240
d) 580 : ( x - 24 ) = 329 - 150 . 2
e) 7. ( x - 14 ) + 35 = 25 + 279 : 9
g) [ ( 6 . x -72) : 2 - 8] . 28 = 5628
Tìm x :
a)\(2^4.x-3^2.x=145-255:51\)
b)\(580:\left(x-24\right)=329-150.2^1\)
c)\(7.\left(x-14\right)+35=25+279:9\)
b)580:(x-24)=329-150.2 580:(x-24)=329-300 580:(x-24)=29 (x-24)=580:29 (x-24)=20 x=20+24 x=44
Tim x thuoc N biet:
a, (225-x) -81=54
b, 7.(x-14)+35= 25+279:9
c, 7x : 49= 727
a. => 225-x=135
=> x=225-135
Vậy x=90.
b. => 7.(x-14)+35=25+31
=> 7.(x-14)=25+31-35
=> 7.(x-14)=21
=> x-14=3
=> x=3+14
Vậy x=17
c. => 7x:72=727
=> 7x-2=727
=> x-2=27
=> x=27+2
Vậy x=29.