Question

R 1 - ( 4/9 + R -7/18)

làm hộ mjk nha

Answer 1

r = 1 -4/9 -r +7/18

18r = 18 -8 -18r + 7

36r = 17

r = 17/36

Answer 2

Đề ko cho dấu ''='' hả bạn nguyễn thùy linh xem kĩ lại đề hộ nhá

Answer 3

tìm R nhé

Answer 4

\(r=1-\left(\dfrac{4}{9}+r-\dfrac{7}{18}\right)\)

\(\Rightarrow r=1-\dfrac{4}{9}-r-\dfrac{7}{18}\)

\(\Rightarrow r=1-\dfrac{8}{18}-\dfrac{7}{18}-r\)

\(\Rightarrow r=1-\dfrac{15}{18}-r\)

\(\Rightarrow r=\dfrac{3}{18}-r\)

\(\Rightarrow r+r=\dfrac{3}{18}\)

\(\Rightarrow2r=\dfrac{3}{18}\)

\(\Rightarrow r=\dfrac{1}{3}\)

Answer 5

\(R=1-\left(\dfrac{4}{9}+r-\dfrac{7}{18}\right)\)

=> \(R=1-\dfrac{4}{9}-r-\dfrac{7}{18}\)

=> \(R=1-\dfrac{8}{18}-\dfrac{7}{18}-r\)

=> \(R=1-\dfrac{15}{18}-r\)

=> \(R=\dfrac{3}{18}-r\)

=> \(R+R\)\(=\dfrac{3}{18}\)

=> \(2R=\dfrac{3}{18}\)

=> \(R=\dfrac{1}{3}\)