Question

am nevoie de cateva exercitii rezolvate si explicate
20.rezolva in multimea z ecuatiile
a -3(-x+2)=-12
b x+2(x- 3)=0
c 2x-(4-3x)=9
d 3(x+2=-2(x+1)-17
e -5(4+3x)+8x-4=-3(x-3)
va rogg dau coroana

Answer 1

Răspuns:

Explicație pas cu pas:

a. 3x-6=-12=>3x=-12+6=-6=>x=-6:3=-2

b. x+2x-6=0=> 3x=6=>x=2

c. 2x-4+3x=9=> 5x=13=>x=13/5

d. 3x+6=-2x-2-17=> 3x+2x=-6-2-17=> 5x= -25=>x=-5

e. -20-15x+8x-4=-3x+9=> -24-7x=-3x+9=> -7x+3x=9+24=> -4x=33=>x=-33/4