Răspuns :
51-(2660:76+x):23 =28
(35+x):23 =51-28
(35+x):23=23
35+x=23*23
35+x=529
x=529-35
x=494
(35+x):23 =51-28
(35+x):23=23
35+x=23*23
35+x=529
x=529-35
x=494
51-(2660÷76+x)÷23=28
(35+x)÷23=51-28
(35+x)÷23=23
35+x=23×23
35+x=529
x=529-35
x=494
(35+x)÷23=51-28
(35+x)÷23=23
35+x=23×23
35+x=529
x=529-35
x=494