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a fost răspuns

a) (2x+11):3-4=3
b)3 inmultit (x+2) - 5=13



c)3 inmultit (2x- 1)-32 =73
d)3 inmultit (2x - 1)+32 =77
e)5 inmultit (x + 25) -1 la puterea 2 inmultit 2 la puterea a doua inmultit 3 la puterea a doua +2 la puterea a patra inmultit la 5=13 la puterea a 2
f)2 inmultit (x+5) -x + 3 inmultit (x - 1) =35
g)7x+5 inmultit (x+3) -10x-x-=20
h)420 -(458-1000:x) +24 inmultit la 7=180

Răspuns :

B. 3X(X+2) -5 =13
3X =6 = 13+5
3X = 18 -6
3X = 12
X- 12:3=4
C.3(2X-1)-32 = 73
6X-3 = 73 +32
6X -3 = 105
6X = 105 =3
6X = 108, X = 108:6= 18
D. 3( 2X - 1) =32 = 77
6X - 3 = 77 - 32
6X-3 = 45
6X = 45 +3
6X = 48
X = 48 :6 =8
G. 7X + 5 (X +3) -10X - X=20
7X +5X +15 -10X - X =20
12X -11X= 20 -15
X = 5
F. 2(X+5) - X +3(X-1)= 35
2X +10-X +3X -3 =35
2X +3X - X = 35 -10+3
4X = 28
X = 7