Найдите корень уравнения : 1) 9 ( x - 1) = x + 15 2) ( 11x + 14) - (5x - 8) = 25 3) 12 - 4( x - 3 ) = 39 - 9x 4) 2( 3x + 5 ) - 3(4x - 1 ) = 11,8

1.  9( x - 1) = x + 15 9x-9=x+15 9x-x=15+9 8x=24 x=24/8 x=3 2. ( 11x + 14) - (5x - 8) = 25 11x+14-5x+8=25 11x-5x=25-14-8 6x=3 x=3/6 x=0.5 3. 12 - 4( x - 3 ) = 39 - 9x 12-(4x-12)=39-9x 12-4x+12=39-9x -4x+9x=39-12-12 5x=15 x=15/5 x=3 4. 2( 3x + 5 ) - 3(4x - 1 ) = 11,8 6x+10-12x+3=11.8 6x-12x=11.8-10-3 -6x=-1.2 x=-1.2/(-6) x=0.2