Буквенное вырожение: образец: 4(x+5)-2x=4x+20-2x=(4-2)x+20=2x+20 1) 6x-4-2(5x-11)= 2) 6(x--12)= 3) x-4-2(3x-12)= 4) 5(3x+2)-2(6x-3)= 5) 9(2x-20)-6(3x-30)=

6х-4-2(5х-11)=6х-4-10х+22=6х-10х+16=(6-10)х+16=-4х+16

6(х-2)-(3х-12)=6х-12-3х+12=(6-3)х=3х

х-4-2(3х-12)=х-4-6х+24=(1-6)х+20=-5х+20

5(3х+2)-2(х-3)=15х+10 -2х+6=(15-2)х+16=13х+16

9(2х-20)-6(3х-30)=18х-180-18х+180=(18-18)х

1) 6х-4-2(5х-11)= 6х-4-10х+22= -4х+18

2)6(х-2)-(3х-12)=6х-12-3х+12= 3х

3)х-4-2(3х-12)=х-4-6х+24=-5х+20

4)5(3x+2)-2(6x-3)=15х+10-12х+6=3х+16

5) 9(2x-20)-6(3x-30)=18х-180-18х+180=0