Răspuns:
c) 14+2* (3-2x+6):2 =37
2*(9-2x):2=37-14=25
2*(9-2x)=25*2=50
9-2x=50:2 9-2x=25 -2x=25-9 -2x=14 x=14:(-2)= -7 x=-7
d) -4- {6-[ -3-3+(-5-x)-7]-9}=1
[6-(-6-5-x -7)-9]=1+4=5 [6-(-11-x-7)-9]=5
[6- (-18-x)-9]=5 6+18+x-9=5 24-9+x=5
15+x= 5 x= 5-15=-10 x=-10
e) 5*(7⁰x⁰-1⁰) + 2x+2= -7x-21+9x-15 +43 (orice nr la 0 este 1)
5*1*x-1*5 +2x+2= 2x-36+43
5x-5+2= 2x-2x +7
5x-3=7 5x= 7+3=10 5x=10 x= 10:5 x= 2
