1) 7(х +3 ) = 2(х+6) 2) 4(2-х )= 6х+283) 8(2х – 1) - вопрос №1632905117326242628382153084484 от kotterbrother 09.07.2020 04:35

Question

Математика: 1) 7(х +3 ) = 2(х+6) 2) 4(2-х )= 6х+283) 8(2х – 1) – 5(3х + 0,8) = х-44) 8х + 40 = 100 + 2х5) 3,5 – 3х = 2,3 + х​

kotterbrother · Answer

1) 7x + 21 = 2x + 127x - 2x = 12 - 215x = -9x = -(9 + 5)x = -142) 8 - 4x = 6x + 288 - 28 = 4x + 6x-20 = 10xx = -20 ÷ 10x = -2...

1) 7(х +3 ) = 2(х+6) 2) 4(2-х )= 6х+283) 8(2х – 1) – 5(3х + 0,8) = х-44) 8х + 40 = 100 + 2х5) 3,5 – 3х = 2,3 + х​