(820-100):(4х-2)-33=7.
720 : (4х - 2) = 7+33
720 : (4х - 2) = 40
40*(4x - 2) = 720
160x - 80 = 720
160x = 800
х = 800 : 160
х = 5
Ответ: 5
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(820-100):(4х-2)-33=7.
720 : (4х - 2) = 7+33
720 : (4х - 2) = 40
40*(4x - 2) = 720
160x - 80 = 720
160x = 800
х = 800 : 160
х = 5
Ответ: 5