Пошаговое объяснение:
4(x - y ) + 4x = 4x - 4y +4x = 8x - 4y = 4( 2x -y ) ;
- 8(x + 8y) - 6x = -8x - 64y - 6x = - 14x - 64y = - 2(7x + 32y) ;
- 4(x -2y) - 7(2x + 3y) = - 4x + 8y - 14x - 21y = - 18x - 13y ;
- (6x - 2y) + 6(8y - 2x) = - 6x + 2y + 48y - 12x = - 18x + 50y = 2( - 9x + 25y).
