Question

Х=-5/27
-4(3.6х-2)-(3-2.1х)+5(0.3х-6)

До поможить..

Answer 1

Ответ:

-4(3,6х-2)-(3-2,1х)+5(0,3х-6)= -14,4х+8-3+2,1х+1,5х-30=

-14,4х+2,1х+1,5х+8-3-30= -10,8х-25

Если $x=-\frac{5}{27}$, то $-10,8*(-\frac{5}{27})-25= -10\frac{8}{10} *(-\frac{5}{27} )-25= -10\frac{4}{5} *(-\frac{5}{27})-25=\frac{54*5}{5*27} -25=2-25= -23$