\(10+2\cdot x=4^5:4^3\)

\(\Rightarrow10+2\cdot x=4^{5-3}\)

\(\Rightarrow10+2\cdot x=4^2\)

\(\Rightarrow10+2\cdot x=16\)

\(\Rightarrow2\cdot x=16-10\)

\(\Rightarrow2\cdot x=6\)

\(\Rightarrow x=\dfrac{6}{2}=3\)

__________________

\(2\cdot x-6^2:18=3\cdot2^2\)

\(\Rightarrow2\cdot x-36:18=12\)

\(\Rightarrow2\cdot x-2=12\)

\(\Rightarrow2\cdot x=12+2\)

\(\Rightarrow2\cdot x=14\)

\(\Rightarrow x=\dfrac{14}{2}=7\)

_________________

\(70-5\cdot\left(x-3\right)=3\cdot2\)

\(\Rightarrow70-5\cdot\left(x-3\right)=6\)

\(\Rightarrow70-5x+15=6\)

\(\Rightarrow-5x+15=6-70\)

\(\Rightarrow-5x+15=64\)

\(\Rightarrow-5x=64-15\)

\(\Rightarrow-5x=49\)

\(\Rightarrow x=-\dfrac{49}{5}\)

\(\left(5.2^6+3.2^6-3.2^6\right):2^6\)

\(=\left[\left(5+3-3\right).2^6\right]:2^6\)

\(=\left[5.2^6\right]:2^6\)

\(=5\)

_Chúc bạn học tốt_

= 5+3-3=5

\( \left(5.2^6+3.2^6-3.2^6\right):2^6\)

\(=\left[2^6.\left(5+3-3\right)\right]:2^6\)

\(=2^6.5:2^6\)

\(=5\)

\(8.3^x+3.2^x-6^x=24\)

\(\Rightarrow8.3^x+3.2^x-6^x-24=0\)

\(\Rightarrow\left(8.3^x-2^x.3^x\right)-\left(24-3.2^x\right)=0\)

\(\Rightarrow3^x\left(8-2^x\right)-3\left(8-2^x\right)=0\Rightarrow\left(8-2^x\right)\left(3^x-3\right)=0\)

\(\Rightarrow\orbr{\begin{cases}2^x=8\\3^x=3\end{cases}\Rightarrow}\orbr{\begin{cases}x=3\\x=1\end{cases}}\)

\(\text{7x - x = 5}^{21}:5^{19}+3.2^2-7^0\)

\(\text{(7-1)x=5}^2\text{ + 3. 4 - 1}\)

\(\text{6x = 25 + 12 - 1}\)

\(\text{6x = 36}\)

\(\text{ x = 6}\)

a)7.x-x=5²¹ :5¹⁹ +3.2² -7⁰

  x.(7-1)=5²+12-1

  x.6     =36

  x         =36:6=6

b)7.x-2.x=6¹⁷:6¹⁵+44:11

   x.(7-2)=6²+4

  x.5      =40

 x=40:5=8

a) 7x-x=5²¹:5¹⁹+3.2²-7⁰

    6x=25+12-1

    6x=36

      x=36:6

      x=6

Vậy x=6

b) 7x-2x=6¹⁷:6¹⁵+44:11

     5x=36+4

     5x=40 

       x=40:5

       x=8

Vậy x=8

a) 210:[16+3.(6+3.2^2)]-3

=210:[16+3.(6+3.4)]-3

=210:[16+3.(6+12)]-3

=210:[16+3.18]-3

=210:[16+54]-3

=210:70-3

=3-3

=0

\(500-\left\{5.\left[409.\left(2^3.3-21\right)^2\right]\right\}-3\)

500-{5.[409.(8.3-21)^2]}-3

500-{5.[409.(24-21)^2]}-3

500-{5.[409.3^2]}-3

500-{5.[409.9]}-3

500-{5.3681}-3

500-18405-3

...............

tự làm nốt nha

x(7-2)=6^2+4

x5=40

x=8

vậy x=8

7x-x=5^21:5^19+3.2^2-7

x(7-1)=5^2+12-7

x6=30

x=5

vậy x=5

nhớ h cho mình

\(7x-2x=6^{17}:6^{15}+44:11\)

\(5x=6^2+4\)

\(5x=36+4\)

\(5x=40\)

\(x=40:5\)

\(x=8\)

\(7x-x=5^{21}:5^{19}+3.2^2-7\)

\(6x=5^2+3.4-7\)

\(6x=25+12-7\)

\(6x=37-7\)

\(6x=30\)

\(x=30:6\)

\(x=5\)

{210:[16+3.(6+3.2^2)]}-3
={210:[16+3.(6+3.4)]}-3
={210:[16+3.(6+12)]}-3
={210:[16+3.18)]}-3
={210:[16+54)]}-3
={210:70)]}-3
=30-3
=27

=27 nhớ tít

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

{210:[16+3.(6+3.4)]}-3

{210:[16+3.(6+12)]}-3

{210:[16+3.18)]}-3

{210:[16+54)]}-3

{210:70)]}-3

30-3

27