Question

BÀI 1:Tính bằng cách hợp lý nhất: | BÀI 2:Tìm x biết:

a) 1\(\frac{4}{23}\)+\(\frac{5}{21}\)-\(\frac{4}{23}\)+0,5+\(\frac{16}{21}\) ; | a) |x+5|-6=9

b) \(23\frac{1}{4}\).\(\frac{7}{5}\)-13\(\frac{1}{4}\):\(\frac{5}{7}\) ; | b) \(\left(x-1\right)^2=25\)

c) \(\frac{2^4.2^6}{\left(2^5\right)^2}-\frac{2^5.15^3}{6^3.10^2}\) |

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BÀI 3:Tìm x biết:

a) \(\frac{x}{12}-\frac{5}{6}=\frac{1}{12}\) e) \(1\frac{1}{2}.x-4=0,5\)

b) \(\frac{2}{3}-1\frac{4}{15}x=\frac{-3}{5}\) f) 2^x-1 =16

c) -2³ +0.5x=1.5 g) (x-1)² =25

d) \(\frac{\left(-3\right)^x}{81}=27\) h) |2x-1|=5