3х-5(6х-7)=5-6(2х+5) -3(х+12)-2(х-18)=-5х 4х=6+2(4х-1) - вопрос №822484335675625312218546241 от VLev147741 11.10.2020 12:59

Question

Математика: 3х-5(6х-7)=5-6(2х+5) -3(х+12)-2(х-18)=-5х 4х=6+2(4х-1) решить )

VLev147741 · Answer

3х  - 5(6х - 7) = 5 - 6(2х + 5)3х - 30х + 35 = 5 - 12х - 303х - 30х + 12х = =30 - 35-15х = - 30х = 2-3(х + 12) - 2(х - 18) = -5х-3х - 36 - 2х + 36 = - 5х-5х = -5хх = 14х = 6 + 2(4х - 1)4х = 6 + 8х - 24х = 8х + 44х -8х = 4-4х = 4х = -1...