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 + 159x-9=x+159x-x=15+98x=24x=24/8x=32.( 11x + 14) - (5x - 8) = 2511x+14-5x+8=2511x-5x=25-14-86x=3x=3/6x=0.53.12 - 4( x - 3 ) = 39 - 9x12-(4x-12)=39-9x12-4x+12=39-9x-4x+9x=39-12-125x=15x=15/5x=34.2( 3x + 5 ) - 3(4x - 1 ) = 11,86x+10-12x+3=11.86x-12x=11.8-10-3-6x=-1.2x=-1.2/(-6)x=0.2