Question

Answer 1

\(a:5+a:8=26\\a\cdot\dfrac{1}{5}+a\cdot\dfrac{1}{8}=26\\a\cdot\bigg(\dfrac{1}{5}+\dfrac{1}{8}\bigg)=26\\a\cdot\dfrac{13}{40}=26\\a=26:\dfrac{13}{40}\\a=80\)

Answer 2

a : 5 + a : 8 = 26

a . 1/5 + a . 1/8 = 26

a.(1/5 + 1/8) = 26

a . 13/40 = 26

a = 26 : 13/40

a = 80

Answer 3

\(a:5+a:8=26\)

\(a:\left(5+8\right)=26\)

\(a:13=26\)

\(a=26.13\)

\(a=338\)

Vậy \(a=338\)