Question

[Trần Thị Tố My]

tìm x

7 :( \(\frac{3,8\times x-57}{19}+3\)) = 1,75

ghi lời giải ra nhé

Answer 1

[Minh Hiền]

\(7:\left(\frac{3,8\times x-57}{19}+3\right)=1,75\)

=> \(\frac{3,8\times x-57}{19}+3=7:1,75\)

=> \(\frac{3,8\times x-57}{19}+3=4\)

=> \(\frac{3,8\times x-57}{19}=4-3=1\)

=> \(3,8\times x-57=19\)

=> \(3,8\times x=19+57=76\)

=> \(x=76:3,8=20\)

Vậy x = 20.