34 + 52 : ( x + 1 ) = 13 . 3
34 + 25 : ( x + 1 ) = 39
25 : ( x + 1 ) = 39 - 34
25 : ( x + 1 ) = 5
x + 1 = 25 : 5
x + 1 = 5
x = 6
+ >34 + 52 : ( x + 1) = 13.3
52 : ( x + 1)= 39-34
52 : ( x + 1)=5
x + 1 = 5
x = 5-1
x = 4
+> 11+ 23 . 3 ( x - 13 ) = 35
23 . 3 ( x - 13 ) = 35 - 11
23 . 3 ( x - 13 )= 24
3 ( x - 13 )= 3
x - 13= 3:3
x - 13=1
x= 1+13
x= 14
34 + 52 : (x + 1) = 13.3
34 + 52 : (x + 1) = 39
52 : (x +1) = 39 - 34
52 : (x +1) = 5
x + 1 = 52 : 5
x + 1 = 5
x = 5 - 1
x = 4
Vậy x = 4
11 + 23 . 3(x - 13) = 35
11 + 8 . 3(x - 13) = 35
24(x - 13) = 35 - 11
24(x - 13) = 24
x - 13 = 24 : 24
x - 13 = 1
x = 1 + 13
x = 14
Vậy x = 14
\(34+5^2:\left(x+1\right)=13.3\Leftrightarrow34+25:\left(x+1\right)=39\)
\(\Leftrightarrow25:\left(x+1\right)=39-34\Leftrightarrow25:\left(x+1\right)=5\)
\(\Leftrightarrow x+1=25:5\Leftrightarrow x+1=5\Leftrightarrow x=5-1\Leftrightarrow x=4\)
\(11+2^3.3\left(x-13\right)=35\Leftrightarrow11+8.3\left(x-13\right)=35\)
\(\Leftrightarrow8.3\left(x-13\right)=35-11\Leftrightarrow8.3\left(x-13\right)=24\)
\(\Leftrightarrow3\left(x-13\right)=24:8\Leftrightarrow3\left(x-13\right)=3\Leftrightarrow x-13=3:3\)
\(\Leftrightarrow x-13=1\Leftrightarrow x=1+13\Leftrightarrow x=14\)