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Narcislupu567
a fost răspuns

Afla valoarea lui ,,a"

a)(46x17-a+12x12-20x15):11=12
b)(a:18+13x16+135):20=20

Răspuns :

Ccrriinnaa
a) ... =(782-a+144-300):11=12
782-a+144-300=11×12=131
782-a+144=131+300=431
782-a=431-144=287
a=782-287=495

b) a:18+208+135=20×20=400
a:18+208=400-135=265
a:18=265-208=57
a=18×57=1008

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