c) 10 . {[(x : 3 + 17) : 10 + 3 . 2^2] : 10} = 5
[(x : 3 + 17) : 10 + 3 . 4] : 10 = 5 : 10
[(x : 3 + 17) : 10 + 12] : 10 = 1/2
(x : 3 + 17) : 10 + 12 = 1/2 . 10
(x : 3 + 17) : 10 + 12 = 5
(x : 3 + 17) : 10 = 5 - 12
(x : 3 + 17) : 10 = -7
=> x : 3 + 17 = -7 . 10
x : 3 + 17 = -70
x : 3 = -70 - 17
x : 3 = -87
x = -87 . 3
x = -261
a ) \(\left(4x+5\right):3-121:1=4\)
\(\Leftrightarrow\left(4x+5\right):3-11=4\)
\(\Leftrightarrow\left(4x+5\right):3=15\)
\(\Leftrightarrow\left(4x+5\right)=45\)
\(\Leftrightarrow4x=40\)
\(\Leftrightarrow x=10\)
Tiếp tịch như z là đc
a, (4.x+5)/3-121/11=4
(4.x+5)/3-11=4
(4.x+5)/3=4+11
(4.x+5)/3=15
4.x+5=15/3
4.x+5=5-----4.x=5-5----4.x=0---x=0/4---x=0
b,2^x+n^x+3=144
2^x+2^x.2^3=144
2^x.(1+2^3)=144
2^x.(1+8)=144
2^x.9=144---2^x=144/9------2^x=16=2^4---x=4
câu c tự làm dài quá tớ ko làm kịp tu la nha
a) (4 . x + 5) : 3 - 121 : 11 = 4
(4 . x + 5) : 3 - 11 = 4
(4 . x + 5) : 3 = 4 + 11
(4 . x + 5) : 3 = 15
4 . x + 5 = 15 . 3
=> 4 . x + 5 = 45
4 . x = 45 - 5
4 . x = 40
x = 40 : 4
x = 10
b) 2^x + 2^x+3 = 144
2^x + 2^x . 2^3 = 144
2^x . (1 + 2^3) = 144
2^x . (1 + 8) = 144
2^x . 9 = 144
2^x = 144 : 9
2^x = 16
2^x = 2^4
=> x = 4
c ) \(10\left\{\left[\left(x:3+17\right):3+3.2^2\right]:10\right\}=5\)
\(\Leftrightarrow\left\{\left[\left(x:3+17\right):10+3.4\right]:10\right\}=0,5\)
\(\Leftrightarrow\left\{\left[\left(x:3+17\right):10+12\right]\right\}=5\) ( bỏ ngoặc đầu ra nha ) ( quên )
\(\Leftrightarrow\left(x:3+17\right):10+12=5\)
\(\Leftrightarrow\left(3x+17\right):10=-7\)
\(\Leftrightarrow\left(3x+17\right)=-\frac{7}{10}\)
\(\Leftrightarrow3x=-24\)
\(\Leftrightarrow x=-8\)
