1) 3x-1=2 (x-2) 2) 3 (x+5)=7-5x 3) 19 (y-9)=3(y+7) - вопрос №8543170131222357531993749385329 от karinaandreevozb5ha 19.08.2020 13:53

Question

Математика: 1) 3x-1=2 (x-2) 2) 3 (x+5)=7-5x 3) 19 (y-9)=3(y+7) 4) (x-9)=3 (x-8) 5) 3 (2x-9)=5(x-4) 6) 7(3-2x )=15 (1-x)

karinaandreevozb5ha · Answer

3х-1=2(х-2)3х-1=2х-43х-2х=1-4х= -33(х+5)=7-5х3х+15=7-5х3х+5х=7 -158х= -8х= -119(у-9)=3(у+7)19у-171=3у+2119у-3у=21+17116у=192у=12х-9=3(х-8)х-9=3х-243х-х=24-92х=15х=7 1/23(2х-9)=5(х-4)6х-27=5х-206х-5х=27-20х=77(3-2х)=15(1-х)21-14х=15-15х15х-14х=15-21х= - 6...