Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Theo mình kết quả là
a, X là 4 b, X = 4 c, X = 5 d, X = 3 e, X = 16
Đúng thì k nhé .
THANKS
Trả lời
A.12:(x+4).3=6
12:(x+4) =6:3
12:(x+4) =2
x+4 =12:2
x+4 =6
x =6-4
x =2
a) 12 : (x + 4).3 = 6
\(\frac{12}{\left(x+4\right)}.3=6\)
\(\frac{36}{\left(x+4\right)}=6\)
x + 4 = 36 : 6
x + 4 = 6
x = 6 - 4
x = 2
b) 12 : (x + 4).3 = 5
\(\frac{12}{\left(x+4\right)}.3=5\)
\(\frac{36}{\left(x+4\right)}=5\)
x + 4 = 36 : 5
x + 4 = \(\frac{36}{5}\)
x = \(\frac{36}{5}\) - 4
x = \(\frac{16}{5}\)
c) 12 : (x + 4).3 + 18 = 24
\(\frac{12}{\left(x+4\right)}.3+18=24\)
\(\frac{18x+108}{x+4}=24\)
18x + 108 = 24x + 96
18x + 108 - 24x = 96
-6x + 108 = 96
-6x = 96 - 108
-6x = -12
x = -12 : -6
x = 2
\(A.12:\left(x+4\right)=2\)
\(\Rightarrow x+4=12:2\)
\(\Rightarrow x+4=6\)
\(\Rightarrow x=2\)
\(B,12:\left(x+4\right).3+18=24\)
\(12:\left(x+4\right).3=6\)
\(\Rightarrow12:\left(x+4\right)=2\)
\(\Rightarrow x+4=6\)
\(\Rightarrow x=2\)
a) 12 : ( x + 4 ) = 2
x + 4 = 12 : 2
x + 4 = 6
x = 6 - 4
x = 2
Vậy x = 2
b) 12 : ( x + 4 ) . 3 + 18 = 24
12 : ( x + 4) . 3 = 24 - 18
12 : ( x + 4 ) . 3 = 6
12 : ( x + 4 ) = 6 : 3
12 : ( x + 4 ) = 2
x + 4 = 12 : 2
x + 4 = 6
x = 6 - 4
x = 2
Vậy x = 2
Học tốt !!!
=))
a) \(5+3^{x+1}=86\)
\(=>3^{x+1}=86-5\)
\(=>3^{x+1}=81=3^4\)
\(=>x+1=4\) ( cùng cơ số )
\(=>x=4-1\)
\(=>x=3\)
b) \(15:\left(x+2\right)=\left(3^3+3\right):10\)
\(=>15:\left(x+2\right)=\left(27+3\right):10\)
\(=>15:\left(x+2\right)=30:10=3\)
\(=>x+2=15:3\)
\(=>x+2=5\)
\(=>x=5-2\)
\(=>x=3\)
c) \(\left(9x+2\right).4=80\)
\(=>9x+2=80:4\)
\(=>9x+2=20\)
\(=>9x=20-2\)
\(=>9x=18\)
\(=>x=18:9\)
\(=>x=2\)
d) \(\left(245-x\right)+7^2=14\)
\(=>\left(245-x\right)+14=14\)
\(=>245-x=14-14\)
\(=>245-x=0\)
\(=>x=245-0\)
\(=>x=245\)
a) \(\left(5x+3^4\right).6^8=6^9.3^4\)
\(=>6x+3^4=3^4.6^9:6^8\)
\(=>6x+3^4=3^4.6\)
\(=>6x=6.3^4-3^4\)
\(=>6x=0\)
\(=>x=0:6\)
\(=>x=0\)
a/(5x + 34).68=69.34
(5x + 34) = 69:68.34
5x + 81 = 6.81
5x = 6.81 - 81
5x = 486 - 81
5x = 425
x = 425:5
x = 85
b/92 - 2x = 2.42- 3.4 + 120:15
92 - 2x = 2.16 - 12 + 8
92 - 2x = 32 - 12 + 8
92 - 2x = 28
2x = 92 - 28
2x = 64
x = 64:2
x = 32
c/53.(3x + 2) : 13 = 103: (135:134)
125.(3x + 2) : 13 = 1000:13
125.(3x+2) = 1000:13.13
125.(3x+2) = 1000
3x + 2 = 1000:125
3x + 2 = 8
3x = 8 - 2
3x = 6
x = 6:3
x = 2
Bạn nhớ tick cho mình nhé!
Bài 1 tìm x
A, (19..x+2..52)..14= (13-18)-42
B, 2..3x= 10..312+8..274
Dấu chấm có nghĩa là dấu nhân!!
a)
x= 43
b) 2X-12=8
2X =8+12
2X=20
X=20:2
x =10
c)45:(3X-17)=32
45 : (3X-17)=9
3X-17=45:9
3X-17=5
3X=5+17
3X=22
x=22:3
x= 7,33
d)(2X-8)x2=24
( 2X-8)x2 =16
2X-8 =16:2
2X-8 =8
2X =8+8
2X =16
x =16:2
X =8
Đúng thì tk nếu sai thì thôi
Làm ẩu ^^
?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????//
a) \(\frac{x}{6}=\frac{5}{24}\Rightarrow x=\frac{5}{24}.6=\frac{5}{4}\)
b) \(-\frac{4}{y}=\frac{20}{14}\Rightarrow y=-4:\frac{20}{14}=-\frac{14}{5}\)
c) \(\frac{4}{7}=\frac{12}{x}\Rightarrow x=12:\frac{4}{7}=21\)
d) \(\frac{3}{7}=\frac{y}{21}\Rightarrow y=\frac{3}{7}.21=9\)
a) ( x - 4 ) . ( x - 3 ) = 0
Thỏa mãn điều kiện x - 4 hoặc x - 3 bằng 0 .
\(\Rightarrow\hept{\begin{cases}x=4\\x=3\end{cases}}\)
b) ( x - 4 ) . ( y - 3 ) = 0
Thỏa mãn điều kiện x - 4 hoặc y - 3 bằng 0 .
\(\Rightarrow\hept{\begin{cases}x=4,x=3\\y=4,y=3\end{cases}}\)
c) x - 24 : 12 = 15
x - 2 = 15
x = 13
d) ( x - 12 ) : 13 = 5
x - 12 = 65
x = 77
e) 1 + 3 + 5 + ..... + x = 36
..... + x = 27
..... + x = 20
x = 11
f) 2 + 4 + .... + 2x = 110
2 + 4 + ....x = 55
Thỏa mãn điều kiện \(x\in N\left|2x+0\right|x⋮2\)
\(x\in\varnothing\)