Magnitogorskru

Verified answer

1)36+20x=50x+12; 20х-50х=12-36; -30х=-24;Х=24/30; х=8/10 или 0,8; /////2)8x+14=4x-26; 8х-4х=-26-14; 4х=-40; х=-40:4;Х=-10; ///3)56+6x=3x-13; 6х-3х=-13-56; 3х=-69; х=-69:3;Х=-23; /////4)-3x+26=4x+40; -3х-4х=40-26; -7х=14; х=14:(-7); х=-2; /////5)5x-17=7x+9; 5х-7х=9+17; -2х=26; х=26:(-2);Х=-13; ////6)-30x+19-20x+85; -50х+104; ///7)3x-1=x+5; 3х-х=5+1; 2х=6; х=6:2; х=3