x + 300 = 900 - 450

x + 300 = 450

x = 450 - 300

x = 150

Mk nhanh nhất đó 

x + 300 = 900 - 450

x + 300 = 450

          x = 450 - 300

           x = 150

k cho tớ nha bn

thank you very much

x+300=900-450

x+300=450

    x   =450-300

    x   =150

vậy x bằng 150

a) 450 : 90 = 45 : 9 = 5            

    560 : 70 = 56 : 7 = 8                                        

    320 : 80 = 32 : 8 = 4

b) 45 000 : 900 = 450 : 9 = 50             

    62 700 : 300 = 627 : 3 = 209                 

    6 000 : 500 = 60 : 5 = 12

\(180:\left\{300:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\\ =180:\left\{300:\left[450-\left(4.125-4.25\right)\right]\right\}\\ =180:\left\{300:\left[450-\left(500-100\right)\right]\right\}\\ =180:\left\{300:\left[450-400\right]\right\}\\ =180:\left\{300:50\right\}\\ =180:6\\ =30\)

\(180:\left\{300:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\\ =180:\left\{300:\left[450-\left(4.125-4.25\right)\right]\right\}\\ =180:\left\{300:\left[450-\left(4.100\right)\right]\right\}\\ =180:\left\{300:\left[450-400\right]\right\}\\ =180:\left\{300:50\right\}\\ =180:6\\ =30\)

180 : { 300 : [ 450 - ( 4 . 5³ - 2² . 25 )]}

= 180 : { 300 : [ 450 - ( 4 . 125 - 4 . 25 )]}

= 180 : { 300 : [ 450 - ( 500 - 100 )]}

= 180 : { 300 : 50 }

= 180 : 6

= 30

180: ( 300: ( 450 - (4 x 5³ - 2²x 25)))

=180: ( 300: ( 450 - ( 500 - 100 )))

=180: ( 300: ( 450 - 400 ))

=180: ( 300: 50)

3^450>5^300

\(5^{300}và3^{450}\\ 5^{300}=15^{327}\\ 3^{450}=15^{445}\)

Vì \(15^{327}< 15^{445}\\ \Rightarrow5^{300}< 3^{450}.\)

5³⁰⁰ = (5²)¹⁵⁰ = 25¹⁵⁰

3⁴⁵⁰ = (3³)¹⁵⁰ = 27¹⁵⁰

Do 25 < 27 nên 25¹⁵⁰ < 27¹⁵⁰

Vậy 5³⁰⁰ < 3⁴⁵⁰

\(3^{450}=\left(3^3\right)^{150}=27^{150}\)

\(5^{300}=\left(5^2\right)^{150}=25^{150}\)

Vì \(27^{150}\)\(>25^{150}\)nên \(3^{450}>5^{300}\)

k mik nha!

để ghi dấu mũ thì bạn có thể viết là shift + 6 nhé

3⁴⁵⁰=(3³)¹⁵⁰=27¹⁵⁰

5³⁰⁰=(5²)¹⁵⁰=25¹⁵⁰

=>3⁴⁵⁰>5³⁰⁰

ta co : 3^450=(3^3)^150=27^150

5^300=(5^2)^150=9^150

vi 27^150>9^150

nên 3^450>5^300