Desfaci parantezele, dar ai grija la semne.
a) 25340-(43121-x)=11
25340-43121+x=11 x-17781=11, x=11+17781, x=17792
b) 1250:(4x+25)=10 impart totul la 10
125: (4x+25)=1 si voi scrie 125=4x+25, 4x=100, x=25
c) (x-8):24=32 vom scrie (x-8)=24x32
(x-8)=768 x=768+8, x=776
d) 4(x+7)=2x+28 4x+28=2x+28, 4x-2x=28-28, 2x=0, x=0
e) 8(x+7)=5x+164, 8x+56=5x+164, 8x-5x=164-56, 3x=108, x=108:3, x=36