Решите уравнение a) ( x - 3/8 ) * 8/35 + 2 2/7 = - вопрос №284143138835227225557237 от erparsian2017 30.06.2021 07:24

Question

Математика: Решите уравнение a) ( x - 3/8 ) * 8/35 + 2 2/7 = 2 2/5 б) 5 5/7 + ( x - 2 3/7 ) = 8 2/7 в) 6 1/5 - ( 2 3/5 + x ) = 3 2/5

erparsian2017 · Answer

A) ( x - 3/8 ) * 8/35 + 2 2/7 = 2 2/5( x - 3/8 ) * 8/35 + 16/7 =12/5  умножим на 35( x - 3/8 ) * 8 + 16*5 =12*78х-3+80=848х=84-80+18х=5х=5/8=0,625б) 5 5/7 + ( x - 2 3/7 ) = 8 2/75 5/7 + x - 2 3/7 = 8 2/7х+3  2/7=8 2/7х=8 2/7-3 2/7=6в) 6 1/5 - ( 2 3/5 + x ) = 3 2/56 1/5 - 2 3/5 - x  = 3 2/56 1/5 - 2 3/5 - x  = 3 2/54 1/5- 3/5-х= 3 2/54 - 2/5-х= 3 2/53 3/5-х= 3 2/5х=3 3/5- 3 2/5=1/5=0,2...