Question

13x+27=16x+4,5: 21x+27=16x+4,5: 1,5x+8=3,1x+16: 2,9x+7,4=x+1,7. Решите пажалуста

Answer 1

$13x + 27 = 16x + 4.5 \ 13x - 16x = 4.5 - 27 \ - 3x = - 22.5 \ x = - 7.5 \ 21x + 27 = 16x + 4.5 \ 21x - 16x = 4.5 - 27 \ 5x = - 22.5 \ x = - 4.5 \ 1.5x + 8 = 3.1x + 16 \ 1.5x - 3.1x = 16 - 8 \ - 1.6x = 8 \ x = - 5 \ 2.9x + 7.4 = x + 1.7 \ 2.9x - x = 1.7 - 7.4 \ 1.9x = - 5.7 \ x = - 3$