Question

решите уравнения:
а)4.37+6.7х=7.75+9.3х
б)4(3-х)-11=7(2х+5)
в)1/4-1/3m=4,1/4-3m

Answer 1

а)4.37+6.7х=7.75+9.3х
6.7х-9.3х=7.75-4.37
-2.6x=3.38
x=3.38/(-2.6)
x=-1,3

б)4(3-х)-11=7(2х+5)
12-4x-11=14x+35
-4x-14x=35-12+11
-18x=34
x=34/(-18)
x=$- frac{18}{34}$

в)$frac{1}{4}- frac{1}{3}m = frac{4,1}{4} - 3m$
$- frac{1}{3}m+3m= frac{4,1}{4}- frac{1}{4}$
$- frac{1}{3}m+ frac{9}{3}m=4 frac{1}{10} : frac{4}{1} - frac{1}{4}$
$frac{8}{3} m= frac{41}{10} * frac{1}{4} - frac{1}{4}$
$frac{8}{3} m = frac{41}{40} - frac{1}{4}$
$frac{8}{3}m= frac{41}{40} - frac{10}{40}$
$frac{8}{3} m= frac{31}{40}$
$m= frac{31}{40} : frac{8}{3} = frac{31}{40} * frac{3}{8} = frac{93}{320}$