Решите уравнения: а) 5x + 6x = 2211 б) 23x + x - 10 = 38 в) 1457 / ( 7 + 8x) = 47 г) 1.5x - 0.2x + 1.4x = 291.6
а)201
б)2
A) 5x + 6x = 2211 11x = 2211 x = 2211/11 x = 201 б) 23x + x - 10 = 38 24x = 38 + 10 24x = 48 x = 48/24 x = 2 в) 1457 / ( 7 + 8x) = 47 1457 / ( 7 + 8x) = 47 / 1 47 ( 7 + 8x) = 1457 329 + 376x = 1457 376x = 1457 - 329 376x = 1128 x = 1128 / 376 x = 3 г) 1,5x - 0,2x + 1,4x = 291,6 1,3x + 1,4x = 291,6 2,7x = 291,6 x = 291,6 ÷ 2,7 x = 108