49-3.(x+6)=13
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49 - 3 . ( x + 6 ) = 13
3 . ( x + 6 ) = 49 - 13
3 . ( x + 6 ) = 36
x + 6 = 36 : 3
x + 6 = 12
x = 12 - 6
x = 6
49 - 3.( x + 6 ) = 13
3.( x + 6 ) = 36
x + 6 = 12
x = 6
Vậy x = 6
![](https://rs.olm.vn/images/avt/0.png?1311)
49 - 3 ( x + 6 ) = 13
3 ( x + 6 ) = 49 - 13
3 ( x + 6 ) = 36
x + 6 = 36 : 3
x + 6 = 12
x = 12 - 6
x = 6
![](https://rs.olm.vn/images/avt/0.png?1311)
49-3:(x+6)=13
3:(x+6) = 49-13=36
x+6 = 36:6=6
x=6-6=0
Vậy x=0
Chắc chắn 100% nhé!!!
Nhớ k cho mk đấy
49-3:(x+6)=13
3:(x+6) =49-13
3:(x+6) =36
x+6 =3:36
x+6 =\(\frac{1}{12}\)
X =1/12-6
X =\(-\frac{71}{12}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
49 - 3 ( X + 6 ) = 13
3 ( X + 6 ) = 49 - 13
3 ( X + 6 ) = 36
X + 6 = 36 : 3
X + 6 = 12
X = 12 - 6
X = 6
![](https://rs.olm.vn/images/avt/0.png?1311)
\(49-3\left(x+6\right)=13\)
\(3\left(x+6\right)=49-13\)
\(3\left(x+6\right)=36\)
\(x+6=36:3\)
\(x+6=12\)
\(x=6\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: Sửa đề; \(A=\dfrac{7.2:2\cdot28.6+1.43\cdot2\cdot64}{1+3+5+7+...+49-339}\)
\(=\dfrac{3.6\cdot28.6+2.86\cdot64}{1+3+5+...+49-339}\)
\(=\dfrac{2.86\left(64+36\right)}{25^2-339}=\dfrac{286}{286}=1\)
b: =>2(x+7/8)=6*13/4=78/4=39/2
=>x+7/8=39/4
=>x=71/8
![](https://rs.olm.vn/images/avt/0.png?1311)
2/3 + 3/4=17/12
9/4 + 3/5=57/20
5/24 + 1/4=11/24
3/15 - 5/35=2/35 18/27 - 2/6=1/3 37/12 - 3=1/12
11/9 x 3/22=1/6 7/13 x 13/7=1 4 x6/7=24/7
2/5 : 3/10=4/3 3/8 : 9/4=1/6 8/21 : 4/7=2/3
49-3.(x+6)=13
46.(x+6)=13
x+6=46-13=33
x=33-6=27
likev![yeu yeu](https://hoc24.vn/media/cke24/plugins/smiley/images/yeu.png)
=> 3.(x+6)= 49-13
=> 3.(x+6)= 36
=> (x+6) = 36:3
=> x+6 = 13
=> x=13-6
=>x=7
tick cho mình nhé