1)3(х-3)-2(7-2х)=3х-9-14+4х=7х-23
8(4-х)+2(3х-6)=32-8х+6х-12=20-2х=2(10-х)
-5(7-х)-3(2х-1)=-35+5х-6х+3=-32-х
4(2х-1)+5(3-2х)=8х-4+15-10х=11-2х
3(х+8)+4(5+2х)=3х+24+20+8х=11х+44=11(х+4)
2)10-(2х+3)-8х=10-2х-3-8х=7-10х
(4х-5)-(10+6х)=4х-5-10-6х=-2х-15
(-18+3х)+(10-7х)=-18+3х+10-7х=-8-4х=-4(2+х)
4+(5+8х)+17х=4+5+8х+17х=9+25х
(15+х)+(7+3х)=15+х+7+3х=4х+22=2(2х+11)
3)-5/8×(3 7/8-5/8)×4 1/8=-5/8×(31/8-5/8)×33/8=-5/8×26/8×33/8=-4290/512=-8 194/512=-8 97/256
5/9×20-5/9×2=5/9×(20-2)=5/9×18=10
(5-1 1/2)×2=(5-1,5)×2=3,5×2=7
3(10-2 1/3)=30-7=23
(0,7+2 5/8)×8=5,6+21=26,6