\(\left\{210:\left[16+3.\left(6+3.22\right)\right]\right\}-3\)

\(=\left\{210:\left[16+3.\left(6+66\right)\right]\right\}-3\)

\(=\left\{210:\left[16+3.72\right]\right\}-3\)

\(=\left\{210:\left[16+216\right]\right\}-3\)

\(=\left\{210:232\right\}-3\)

\(=\dfrac{105}{116}-3\)

\(=\dfrac{-243}{116}\)

\(\left\{210:\left[16+3.\left(6+3.2^2\right)\right]\right\}-3\)

\(=\left\{210:\left[16+3.\left(6+3.4\right)\right]\right\}-3\)

\(=\left\{210:\left[16+3.\left(6+12\right)\right]\right\}-3\)

\(=\left\{210:\left[16+3.18\right]\right\}-3\)

\(=\left\{210:\left[16+54\right]\right\}-3\)

\(=\left\{210:70\right\}-3\)

\(=3-3\)

\(=0\)

\(3^2+2^4.3^3.19+3^5=9+16.27.19+243=9+8208+243=8460\)

3² + 2⁴ . 3³ .19 + 3⁵

= 9 + 16 . 27 . 19 + 243

= 9 + 8208 + 243

= 8460

#Học tốt!!!

~NTTH~

\(60\%x+\frac{2}{3}x=\frac{1}{3}\cdot\frac{19}{3}\)

\(\Rightarrow\frac{3}{5}x+\frac{2}{3}x=\frac{19}{9}\)

\(\Rightarrow(\frac{3}{5}+\frac{2}{3})x=\frac{19}{9}\)

\(\Rightarrow\frac{19}{15}x=\frac{19}{9}\)

\(\Rightarrow x=\frac{19}{9}:\frac{19}{15}=\frac{95}{57}\)

Vậy \(x=\frac{95}{57}\)

a 27 . 75 + 25 . 27 - 150

= 27 . ( 75 + 25 ) - 150

= 27 . 100 - 150

= 2700 - 150

2550

`#3107.101107`

a)

\(5\left(x-1\right)^3=40\\\Rightarrow\left(x-1\right)^3=40\div5\\ \Rightarrow\left(x-1\right)^3=8\\ \Rightarrow\left(x-1\right)^3=2^3\\ \Rightarrow x-1=2\\ \Rightarrow x=2+1\\ \Rightarrow x=3\)

Vậy, `x = 3`

b)

\(3^{2x+1}+9^x=324?\\ \Rightarrow3^{2x}\cdot3+3^{2x}=324\\ \Rightarrow3^{2x}\cdot\left(3+1\right)=324\\ \Rightarrow3^{2x}\cdot4=324\\ \Rightarrow3^{2x}=81\\ \Rightarrow3^{2x}=3^4\\ \Rightarrow2x=4\\ \Rightarrow x=2\)

Vậy, `x = 2`

c)

\(5^x-13=3\cdot2^2\\ \Rightarrow5^x-13=12\\ \Rightarrow5^x=12+13\\ \Rightarrow5^x=25\\ \Rightarrow5^x=5^2\\ \Rightarrow x=2\)

Vậy, `x = 2`

d)

\(8^x+2^{3x+1}=192\\ \Rightarrow2^{3x}+2^{3x}\cdot2=192\\ \Rightarrow2^{3x}\left(1+2\right)=192\\ \Rightarrow2^{3x}\cdot3=192\\ \Rightarrow2^{3x}=64\\ \Rightarrow2^{3x}=2^6\\ \Rightarrow3x=6\\ \Rightarrow x=2\)

Vậy, `x = 2.`

a) 232 - (581 + 132 - 331)

= 232 - 581 - 132 + 331

= (232 - 132) - (581 - 331)

= 100 - 250

= - (250 – 100)

= - 150

b) [12 + (-57)] - [- 57 - (-12)]

= (12 – 57) – (- 57 + 12)

= 12 - 57 + 57 - 12

= (12 – 12) + (57 – 57)

= 0 + 0

= 0

a) 232 - (581 + 132 - 331)

= 232 - 581 - 132 + 331

= (232 - 132) - (581 - 331)

= 100 - 250

= - (250 – 100)

= - 150

b) [12 + (-57)] - [- 57 - (-12)]

= (12 – 57) – (- 57 + 12)

= 12 - 57 + 57 - 12

= (12 – 12) + (57 – 57)

= 0 + 0

= 0

Tham khảo :

a) 232 - (581 + 132 - 331)

= 232 - 581 - 132 + 331

= (232 - 132) - (581 - 331)

= 100 - 250 = -150

b) [12 + (-57)] - [-57 - (-12)]

= 12 - 57 + 57 - 12

= (12 - 12) + (57 - 57)

= 0