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Afla valoarea lui a pentru : (a+9 ×2+4×7)-6×8+3×7=8×7+2×9

Răspuns :

(a+9 ×2+4×7)-6×8+3×7=8×7+2×9

(a+18+28)-48+21=56+18

(a+18+28)-48+21=74

(a+18+28)-48=74-21

(a+18+28)-48=53

a+18+28=53+48

a+18+28=101

a+18=101-28

a+18=73

a=73-18

a=55




(a+18+28)-48+21=56+18
a+46-48=74-21
a+46=53+48
a=101-46
a= 54