N 1
( 2x / 5 ) - ( x + 18 / 6 ) = 23 + ( x / 30 )
2x * 6 - 5 * ( x + 18 ) = 23 * 30 + x
12x - 5x - 90 = 690 + x
7x - x = 690 + 90
6x = 780
X = 130
ОТВЕТ Х = 130
N 2
( x - 1 ) / 3 + ( 2x + 1 ) / 5 = 3x - 1 / 4
20 * ( x - 1 ) + 12 * ( 2x + 1 ) = 15 * ( 3x - 1 )
20x - 20 + 24x + 12 = 45x - 15
44x - 8 = 45x - 15
45x - 44x = - 8 * 15
X = 7
ОТВЕТ Х = 7