Bài 1 Tìm x 

a) \(^{2^3}\) + ( x - \(^{3^2}\)) = \(5^3\)-\(4^3\)

b 5 . ( x + 7 ) - 10 = \(2^3\).5

c \(3^2\). 2 + ( x + \(5^2\)) = \(10^2\)

d 7 . ( x + 5 ) + 14 = \(7^3\)

bài 3

20 - [ 7 . ( x - 3 ) + 4 ] = 2

b ( 3 .\(2^x\)-1 ) - 2 = 45

c 75 : ( x + 2 ) = \(5^3\)- ( \(3^2\)+ \(4^2\)) . \(2^2\)

d \(3^2\). ( x +1 )- 3 = \(2^3\)+ ( \(7^2\). 2 ) : 14

1,tìm x

a.\(3^x\)=81

b.\(5^{x+2}\)=125

c.\(2^3\)*\(2^{x-1}\)=64

d. 7*\(7^{n+1}\)=343

e.\(\left(x+3\right)^5\)=243

f.\(\left(2x-3\right)^6\)=64

g.\(\left(x-6\right)^3\)=\(\left(x-6\right)^2\)

h.\(\left\{\left[\left(2x+14\right):2^2-3\right]:3\right\}\)-1=0

i.\(\left\{\left[\left(x:3+17\right):10+3\cdot2^4\right]:10\right\}=5\)

2,tính

a.\(7^{3^1}\)         b.\(7^{1^3}\)      c.\(6^{1^{2^{3^4}}}\)       d.\(2017^{2^{0^{1^0}}}\)      e.\(6^3:6^2-6^2:6\)    f.\(\frac{11\cdot2^{22}\cdot3^7-9^{15}}{\left(2\cdot3^{14}\right)^2}\)

bài 1 : tìm x biết

a, \(\frac{2}{3}\times\left(x-\frac{5}{6}\right)+\frac{1}{4}=\frac{22}{9}\)

b, \(\frac{2}{3}:\frac{x}{5}=\frac{10}{21}\)

c, \(\frac{7}{3}:\frac{x}{5}=\frac{14}{15}\)

d, \(1-\left(5\frac{4}{9}\times x-7\frac{7}{18}\right):15\frac{3}{4}=0\)

bài 2 : tính gtri bt

a,\(\frac{8}{7}+\frac{1}{5}\times\frac{10}{9}\)

b, \(\frac{3}{2}+\left(\frac{9}{2}+\frac{2}{9}\right)\times\left(\frac{4}{3}-\frac{5}{4}\right)\)

!_ove

bài 2 tìm x

a,\(\frac{-2}{3}.x+\frac{1}{5}=\frac{3}{10}\)

b,\(\left|x\right|-\frac{3}{4}=\frac{5}{3}\)

c,\(\frac{2}{3}.x-\frac{1}{2}=\frac{1}{10}\)

d,\(\frac{3}{5}+\frac{4}{9}:x=\frac{2}{3}\)

e,\(\left|x+75\%\right|=2\frac{1}{5}\)

i,\(\left(x+\frac{1}{2}\right).\left(\frac{2}{3}-2.x\right)=0\)

k,\(\frac{4}{7}.x-\frac{2}{3}=\frac{1}{5}\)

l,\(\frac{2}{3}.x-\frac{3}{2}.x=\frac{5}{12}\)

m,\(\left|2.x-\frac{1}{3}\right|+\frac{5}{6}=1\)

n,\(\frac{1}{3}-\frac{7}{8}.x=\frac{1}{3}\)

11,\(\frac{x+2}{5}=\frac{7}{12}-1\frac{1}{4}\)

12,\(\left(2\frac{4}{5}.x-50\right):\frac{2}{3}=51\)

13,\(\frac{2}{5}+\frac{3}{5}.\left(3.x-3,7\right)=-\frac{53}{10}\)

14,\(\frac{7}{9}:\left(2+\frac{3}{4}.x\right)+\frac{5}{9}=\frac{23}{27}\)

Bài 1:Thực hiện phép tính

\(a,75\%-1\frac{1}{2}+0,5:\frac{5}{12}-\left(\frac{-1}{2}\right)^2\)         \(b,\left(\frac{5}{7}.0,6-5:3\frac{1}{2}\right).\left(40\%-1,4\right).\left(-2\right)^3\)

Bài 2: Tính nhanh

                                               \(\left(\frac{-4}{5}+\frac{4}{3}\right)+\left(\frac{-5}{4}+\frac{14}{5}\right)-\frac{7}{3}\)

Bài 3:Tìm x biết

\(a,\frac{-2}{3}-\frac{1}{3}.\left(2x-5\right)=\frac{3}{2}\)      \(b,\frac{2}{5}.x+\frac{1}{2}=\frac{-3}{4}\)      \(\frac{1}{3}.x-8=\frac{1}{2}\)       \(x-\frac{1}{4}=\frac{5}{8}.\frac{2}{3}\)

Bài 4: Tìm x biết

\(a,\left(\frac{3}{4}.x+2\frac{1}{2}\right).\frac{-2}{3}=\frac{1}{8}\)                          \(b,\frac{1}{3}.x-0,5=0,75\)

Bài 5: Tìm x biết 

\(a,\frac{2}{5}+\frac{3}{5}.\left(3x-3,7\right)=-\frac{53}{10}\)       \(b,5,2.x+7\frac{2}{5}=6\frac{3}{4}\)       \(2,4:\left(\frac{-1}{2}-x\right)=1\frac{3}{5}\)

Bài 6:Tìm số tự nhiên x,biết: \(\left(x-5\right).\frac{30}{100}=\frac{20.x}{100}+5\)

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