х : 8 = 49
52+72 : x =56
( x - 23 ) : 26 =8
1728 : ( 56 - x ) = 36

1) х = 49×8х = 3922) х = (52+72) ÷ 56х = 124 ÷ 56х = 2 3/143)х- 23 = 26×8х - 23 = 208х = 208+23х = 2314)56- х = 1728 ÷ 36 56 -х = 48х = 56- 48х = 8