Question

exercitiul 5 doar pe : e, f, g, si exercitiul 6. va rog ajutatima !!! urgentt! !!​

Answer 1

Răspuns:

Explicație pas cu pas:

e )2la a 2 *3=-6x ; 4*3=-6x ; 12=-6x ; x=12:-6; x=-2

f)(2+3)x =-15 ; 5x=-15 ; x=-15:5 ;x= -3

g)(79-84)x= -10 ; -5x = -10 ; x=-10:-5 ; x=2

6 a) 2x-3=1 ; 2x=1 +3 :2x=4; x=4:2; x=2

b)5-3x=-1 ; -3x = -1 -5; -3x= -6; x= -6: - 3 ; x=2

c)13=3x-4 ; 13+4=3x ; 17=3x ;x=17:3 ;x=5,(6)

d)-27= 6x-3 ; -27+3=6x ;-24=6x ;x= -24:6 ; x= -4

e)5(x-8)=4x-39 ; 5*x-5*8 = 4x-39 ; 5x-40=4x-39 ; 5x-4x=-39+40; x= 1

f)- 4+3(x+5)=10 ; -4+3x +15 =10 ;3x =10+4-15 ; 3x=-1 ;x= -1:3 x= -0,(3)

g) 2(x-1) =3(x+4) ; 2x-2=3x+12 ; 2x-3x =12+2 ;-x=14 se *(-1) ; x=-14