Tìm x biết :
[(6x-72):2-84].28= 5628
Tìm số tự nhiên x, biết: [(6x − 72) : 2 − 84] . 28 = 5628
[(6x − 72) : 2 − 84] . 28 = 5628
(6x – 72) : 2 – 84 = 5628 : 28
( 6x – 72) : 2 – 84 = 201
(6x – 72) : 2 = 201 + 84
( 6x – 72) : 2 = 285
6x – 72 = 285.2
6x – 72 = 570
6x = 570 + 72
6x = 642
x = 642 : 6
x = 107
Vậy x = 107
tìm x
[(6x - 72) : 2- 84].28= 5628
(6x-72) : 2 - 84 = 5628:28
(6x-72):2-84= 201
(6x -72):2= 201+84
(6x-72):2= 285
6x-72=285x2
6x-72=570
6x= 570+72
6x= 642
x=642:6
x= 107
[ ( 6x - 72 ) : 2 - 84 ] . 28 = 5628
=> ( 6x - 72 ) : 2 = 201
=> 6x - 72 = 402
=> 6x = 474
=> x = 79
Tìm x biết:
a)2600+6000-3x=1200
b)[(6x-72):2-84]-28=5628
a) câu này không có vì
2600+600-3x=1200
3x=2600+600-1200
3x=7400 không chia hết cho 3
Tìm x:
a) (3x - 24) . 73 = 2 . 74
b) 5. (x - 3)2 + 17 = 142
c) [(6x - 72) : 2 - 84] . 28 = 5628
a) Xem lại đề.
b) 5. (x - 3)2 + 17 = 142
5. (x - 3)2 = 142 - 17
5. (x - 3)2 = 125
(x - 3)2 = 125 : 5
(x - 3)2 = 25
(x - 3)2 = 52 (cùng số mũ)
⇒ x - 3 = 5
x = 5 + 3 = 8
c) [(6x - 72) : 2 - 84] . 28 = 5628
[(6x - 72) : 2 - 84] = 5628 : 28
[(6x - 72) : 2 - 84] = 201
(6x - 72) : 2 = 201 + 84
(6x - 72) : 2 = 285
6x - 72 = 285. 2
6x - 72 = 570
6x = 570 + 72
6x = 642
x = 642 : 6
x = 107
Tìm x bạn nào làm đung minh cho mot like
[(6x -72) :2-84) .28 =5628
[(6x - 72):2 - 84].28=5628
(6x - 72):2-84=201
(6x - 72):2 = 285
6x - 72 = 570
6x = 642
x = 107
=.= hok tốt!!
[(6x - 72) : 2 - 84] x 28 = 5628
[(6x - 72) : 2 - 84] = 5628 : 28
[(6x - 72) : 2 - 84] = 201
(6x - 72) : 2 = 201 + 84
(6x - 72) : 2 = 285
6x - 72 = 285 x 2
6x - 72 = 570
6x = 570 + 72
6x = 642
x = 642 : 6
x = 107
Học tốt!!!
\(\left[\left(6x-72\right)\div2-84\right].28=5628\)
\(\Rightarrow\left[\left(6x-72\right)\div2-84\right]=5628\div28\)
\(\Rightarrow\left[\left(6x-72\right)\div2-84\right]=201\)
\(\Rightarrow\left(6x-72\right)\div2=201+84\)
\(\Rightarrow3x-36=285\)
\(\Rightarrow3x=285+36\)
\(\Rightarrow3x=321\)
\(\Rightarrow x=321\div3\)
\(\Rightarrow x=107\)
Tìm x:
a) 2600+6000-3x=1200
b)[(6x-72):2-84]-28=5628
b)[(6x-72):2-84]-28=5628
[(6x-72):2-84] = 5628+28
[(6x-72):2-84] = 596
(6x-72) = 596+84
(6x-72) = 680
6x = 680 +72
6x = 752
x =125,333....
b) là
[(6x-72):2-84]-28=5628
[(6x-72):2-84] =5628+28=5656
[(6x-72):2 =5656+84=5740
6x-72 =5740.2
6x-72 =11480
6x =11480+72
6x =11552
x =11552:6=1925,333....
tim x
( 6x - 72 : 2 - 84 ) x 28 = 5628
( 6x - 72 : 2 - 84) x 28 = 5628
(6x - 36 - 84) = 5628 : 28
6x - 36 - 84 = 201
6x = 201 + (36 + 84)
6x = 321
x = 53,5
[(6x-72)÷2-84]×28=5628
[(6x-72)÷2-84]×28=5628
[(6x-72)÷2-84] =5628÷28
[(6x-72)÷2-84] =201
(6x-72)÷2 =201+84
(6x-72)÷2 =285
(6x-72) =285×2
(6x-72) =570
6x =570+72
6x =642
x =642÷26
x =107
[ ( 6x - 72 ) : 2 - 84 ] × 28 = 5628
[(6x-72):2-84]×28=5628
⇔x=107 ....
Vậy x=107
\([(6x-72):2-84].28=5628\)
\((6x-72):2-84=5628:28\)
\((6x-72):2-84=201\)
\((6x-72):2=201+84\)
\((6x-72):2=285\)
\(6x-72=285.2\)
\(6x-72=570\)
\(6x=570+72\)
\(6x=642\)
\(x=642:6\)
\(x=107\)