Question

Aflati valoarea lui "a":
[(a+705ori5)-1500ori2]impartit la 5=160

si urmatorul.: [(a impartit la 7-30ori10)impartit la 4+35]ori9=945

Answer 1

[(a+705·5)-1500·2]:5=160

[(a+3525)-3000]:5=160

(a+3525)-3000=160·5

(a+3525)-3000=800

a+3525=800+3000

a+3525=3800

a=3800-3525

a=275





[(a :7-30·10): 4+35]·9=945

(a :7-300): 4+35=945:9

(a :7-300): 4+35=105

(a :7-300): 4=105-35

(a :7-300): 4=70

a :7-300=70·4

a :7-300=280

a:7=280+300

a :7==580

a=580·7

a=4060