Question

решите 3 плиз !!!!!!!

Answer 1

0.6(х-2)+4.6=0.4(7+х)

0.6х-1.2+4.6=0.28+0.4х

0.6х-0.4х=0.28+1.2-4.6

0.2х=-3.12

х=-3.12:0.2

х=-15.6

$\frac{x-1}{5-x} =\frac{2}{9} \\\\ 9(x-1)=2(5-x)\\9x-9=10-2x\\9x+2x=10+9\\11x=19\\\\x=19:11\\x=1\frac{8}{11}$