= 3^6 - 4 x 3 + 5^8 x 5^0 : 25^2

= 729 - 12 + 5^8 x 5^0 : 5^4

= 729 - 12 + 5^4

= 729 - 12 + 625

= 717 + 625

= 1342

bằng 0

\(3^3.9-3^4+5^8.5^0-5^{12}:25^2\)

\(=27.9-81+3905625.1-244140625:625\)

\(=-1235961951^{13}\)

y x 7 + y x 9 - y - y x 5 = 790

y x ( 7 + 9 - 1 - 5 ) = 790

y x 10 = 790

y = 790 : 10

y = 79

không có dấu không hiểu

y nhân 7 cộng y nhân 9 trừ y trừ y nhân 5 bằng 790

\(a,\frac{9}{14}\cdot y=\left[\frac{5}{7}-\frac{3}{14}\right]\cdot\frac{4}{7}\)

\(\Rightarrow\frac{9}{14}\cdot y=\left[\frac{10}{14}-\frac{3}{14}\right]\cdot\frac{4}{7}\)

\(\Rightarrow\frac{9}{14}\cdot y=\frac{1}{2}\cdot\frac{4}{7}\)

\(\Rightarrow\frac{9}{14}\cdot y=\frac{2}{7}\)

\(\Rightarrow y=\frac{2}{7}:\frac{9}{14}=\frac{2}{7}\cdot\frac{14}{9}=\frac{2}{1}\cdot\frac{2}{9}=\frac{4}{9}\)

\(\Leftrightarrow y=\frac{4}{9}\)

b, tương tự

\(\frac{3}{5}-\frac{1}{15}\times\frac{10}{13}\)

\(=\frac{3}{5}-\frac{10}{195}\)

\(=\frac{39}{195}-\frac{10}{195}\)

\(=\frac{29}{195}\)

\(\frac{3}{5}-\frac{1}{15}=\frac{8}{15}\)

\(\frac{8}{15}\cdot\frac{10}{13}=\frac{16}{39}\)

ta có :

X : 3 - 4 x 5 = 15

X : 3  - 4 = 15:5

X:3-4=3

X:3=3+4

X:3= 7

X= 7 x 3

X = 21

nhầm. tick nha!

37 phần 35

dap an cua minh la

2379

3 535 834

kết quả đó k mình nha

427x15-200x15-27x38=6405-3000-1026

                               =2379

7.6^10.2^20.3^6-2^19.6^15/9.6^19.2^9-4.3^17.2^26