Решите уравнения 1) -2х+1+5(х-2)=-4(3-х)=1 2) - вопрос №384370612152431252422235 от урааа28 16.06.2021 20:56

Question

Алгебра: Решите уравнения 1) -2х+1+5(х-2)=-4(3-х)=1 2) (х-5)^2 +(х+4)^2=2х^2 3) 5+ х/2=3x+6/5

урааа28 · Answer

1) -2х+1+5(х-2)=-4(3-х)+1-2x+1+5x-10 = -12+4x+13x-9 = 4x-114x-3x = 11-9x = 22) (х-5)^2 +(х+4)^2=2х^2x^2-10x+25 +x^2+8x+16 = 2x^2-2x+41= 2x^2 - 2x^22x = 41x = 41/2x =20,53) 5+ х/2=3x+6/55+ 0,5x =3x +1,22,5x = 3,8x = 3,8/2,5x = 1,52...