giúp e bài 4 câu d e f ạ lm đầy đủ các bước e sẽ k nhé
Bài 4
d. 450 : [ 41 - (2x - 5) ] = 32 . 5
450 : [ 41 - (2x - 5) ] = 9 . 5
450 : [ 41 - (2x - 5) ] = 45
[ 41 - (2x - 5) ] = 450 : 45
41 - (2x - 5) = 10
(2x - 5) = 41 - 10
2x - 5 = 31
2x = 31 + 5
2x = 36
x = 36 : 2
x = 1
e. 30 : (x - 7) = 1519 : 158
30 : (x - 7) = 15
x - 7 = 30 : 15
x - 7 = 2
x = 2 + 7
x = 9
f. (2x - 3)3 = 125
2x - 3 = 5
2x = 5 + 3
2x = 8
x = 8 : 2
x = 4
tk cho cj nha
a)\(210-5\left(x-10\right)=200\)
\(5-\left(x-10\right)=210-200\)
\(5-\left(x-10\right)=10\)
\(x-10=5-10\)
\(x-10=-5\)
\(x=\left(-5\right)+10\)
\(x=5\)
d e f bạn ơi abc mik lm rồi
chờ mik chút mk làm tiếp câu còn lại
d) 450 : [ 41 – (2x – 5)] = 32 . 5
450 : [ 41 – (2x – 5)] = 9 . 5
450 : [ 41 – (2x – 5)] = 45
[ 41 – (2x – 5)] = 450 : 45
41 – (2x – 5) = 10
(2x – 5) = 41 – 10
2x – 5 = 31
2x = 31 + 5
2x = 36
x = 36 : 2
x = 18
d.450:[41-(2x-5)]=45
41-(2x-5)=450/45
41-(2x-5)=10
2x-5=41-10
2x-5=31
2x=31+5
x=36/2=18
b)\(\left(5x-39\right).7+3=80\)
\(\left(5x-39\right).7=80-3\)
\(\left(5x-39\right).7=77\)
\(5x-39=77:7\)
\(5x-39=11\)
\(5x=11+39\)
\(5x=50\)
\(x=50:5\)
\(x=10\)
f. (2x-3)^3=125
(2x-3)^3=5^3
2x-3=5
2x=8
x=4
không biết bởi vì em học lớp 4
e) 30 : (x - 7) = 159 : 158
30 : (x - 7) = 159-8
30 : (x - 7) = 151
30 : (x - 7) = 15
x – 7 = 30 : 15
x – 7 = 2
x = 2 + 7
x = 9
câu e)
e)\(\left(2x-3\right)^3=125\)
\(\left(2x-3\right)^3=5^3\)
=> \(2x-3=5\)
\(2x=5+3\)
\(2x=8\)
\(x=8:2\)
\(x=4\)
e. 30:(x-7)=15^9:15^8
30:(x-7)= 15^9-8
30:(x-7)=15
x-7=30/15
x-7=2
x=9
f) (2x – 3)3 = 125
(2x – 3)3 = 53
2x – 3 = 5
2x = 5 + 3
2x = 8
x = 8 : 2
x = 4
Chúc bạn học tốt 💙
thanks nhé
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