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\(\left(x+2\right)-2=0\)
\(\Rightarrow x+2-2=0\)
\(\Rightarrow x=0\)
\(\left(x+3\right)+1=7\)
\(\Rightarrow x+3+1=7\)
\(\Rightarrow x+4=7\)
\(\Rightarrow x=3\)
\(\left(3x-4\right)+4=12\)
\(\Rightarrow3x-4+4=12\)
\(\Rightarrow3x=12\)
\(\Rightarrow x=4\)
\(\left(5x+4\right)-1=13\)
\(\Rightarrow5x+4-1=13\)
\(\Rightarrow5x+3=13\)
\(\Rightarrow5x=10\)
\(\Rightarrow x=2\)
\(\left(4x-8\right)-3=5\)
\(\Rightarrow4x-8-3=5\)
\(\Rightarrow4x-11=5\)
\(\Rightarrow4x=16\)
\(\Rightarrow x=4\)
\(8-\left(2x+4\right)=2\)
\(\Rightarrow8-2x-4=2\)
\(\Rightarrow4-2x=2\)
\(\Rightarrow2x=2\)
\(\Rightarrow x=1\)
\(7+\left(5x+2\right)=14\)
\(\Rightarrow7+5x+2=14\)
\(\Rightarrow9+5x=14\)
\(\Rightarrow5x=5\)
\(\Rightarrow x=1\)
\(5-\left(3x-11\right)=1\)
\(\Rightarrow5-3x+11=1\)
\(\Rightarrow16-3x=1\)
\(\Rightarrow3x=15\)
\(\Rightarrow x=5\)
TL :
\(12\left(x-81\right):3=4^3+2^3\)
\(12\left(x-81\right):3=64+8\)
\(12\left(x-81\right):3=72\)
\(12\left(x-81\right)=72.3\)
\(12\left(x-81\right)=216\)
\(x-81=216:12\)
\(x-81=18\)
\(\Rightarrow x=109\)
Câu b đang suy nghĩ. ( mik ngu vl )
3. ( 3 x - 9 ) = 81
3 x - 9 = 81 : 3
3 x - 9 = 27
3 x = 27 + 9
3 x = 36
x = 36 : 3
x = 12
[( 6 x - 32 ) : 2 + 56 ] . 14 = 2814
( 6 x - 32 ) : 2 + 56 = 2814 : 14
( 6 x - 32 ) : 2 = 201 - 56
6 x - 32 = 145. 2
6 x = 290 + 32
x = 322 : 6
dư nha bạn
a: =>12x-64=32
=>12x=96
=>x=8
b: =>x-1=5
=>x=6
c: =>2^x*3=96
=>2^x=32
=>x=5
a) x – 32 : 16 = 48 ó x – 2 = 48 ó x = 48 + 2 ó x = 50
b) 88 – 3.(7+x) = 64 ó 3.(7+x) = 88 – 64 ó 7 + x = 24:3 ó x = 8 – 7 ó x = 1
c) (5+4x) : 3 – 121 : 11 = 4 ó (5+4x) : 3 – 11 = 4 ó (5+4x) : 3 = 4 + 11 ó 5+4x = 15.3 ó 4x = 45 – 5 ó 4x = 40 ó x = 10
d) 15 – 2(3x+1) = 11.13 – 130 ó 15 – 2(3x+1) = 143 – 130 ó 15 – 2(3x+1) = 13
ó 2(3x+1) = 15 – 13 ó 3x + 1 = 2:2 ó 3x = 1 – 1 ó 3x = 0 ó x = 0
\(\left(3x+4\right)^2=3^2+2^3+83\\ \Leftrightarrow\left(3x+4\right)^2=9+8+83\\ \Leftrightarrow\left(3x+4\right)^2=100\\ \Leftrightarrow\left(3x+4\right)^2=10^2\)
\(\Rightarrow\left[{}\begin{matrix}3x+4=10\\3x+4=-10\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=2\\x=-\dfrac{14}{3}\end{matrix}\right.\)
Vậy số tự nhiên x cần tìm là x = 2
x = 2