Question

(4,57-3,5x)×2,06=7,828 решите уравнения​

Answer 1

$\displaystyle (4,57-3,5x)*2,06=7,828\\9,4142-7,21x=7,828\\-7,21x=7,828-9,4142\\-7,21x=-1,5862\\x=0,22$