1.3(х-2)-5(х+3)=0 2.6х-3(х-1)=2+5х 3.5-2х=1-(х-2) - вопрос №89981591325302631253521241442153171 от Barby228 26.11.2020 08:29

Question

Математика: 1.3(х-2)-5(х+3)=0 2.6х-3(х-1)=2+5х 3.5-2х=1-(х-2) 4.14-(4+2х)=1+х 5.3-х=1-7(х=1) 6.2-5(х-1)=1+3х

Barby228 · Answer

1.3(х-2)-5(х+3)=03x - 6 - 5x - 15 = 0-2x - 21 = 0-2x = 21x = -21:2x = -10,52.6х-3(х-1)=2+5х6x - 3x + 3 = 2 + 5x3x + 3 = 2 + 5x3x - 5x = 2 - 3-2x = -1x = 1 : 2x = 0,53.5-2х=1-(х-2)5 - 2x = 1 - x + 25 - 2x = 3 - x-2x + x = 3 - 5-x = -2x = 24.14-(4+2х)=1+х14 - 4 - 2x = 1 + x10 - 2x = 1 + xx + 2x = 10 - 13x = 9x = 9 : 3x = 35.3-х=1-7(х=1)3 - x = 1 - 7x - 73 - x = -6 - 7x-x + 7x = -6 -36x = -9x = -9:6x = -1,56.2-5(х-1)=1+3х2 - 5x + 5 = 1 + 3x7 - 5x = 1 + 3x3x + 5x = 7 - 18x = 6x = 6:8x = 0,75...