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rezolvati ecuatiile si comentati: 4z-z=24+5x12
8y+7y=1000:8x3
35+16+a=200-48
b-(21+2x16)=308:4


Răspuns :

4z-z=24+5x12
3z=24+60
3z=84
z=84:3
z=28

8y+7y=1000:8x3
15y=125x3
15y=375
y=375:15
y=25

35+16+a=200-48
51+a=152
a=152-51
a=101

b-(21+2x16)=308:4
b-(21+32)=77
b-53=77
b=77+53
b=130