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Va rog frumos daca ma puteți ajuta 96-(5×5+a×6-40)×2=9×10

Răspuns :

96-(25+6a-40)*2=90
96-(6a-15)*2=90
96-12a+30=90
-12a= 90-30-96
-12a=-36
a=3

96-(5x5+ax6-40)x2=9x10

96-(25+6a-40)x2=90

(25+6a-40)x2=96-90=6

25+6a-40=6:2=3

25+6a=40+3=43

6a=43-25=18

a=18:6

a=3

                               R:a=3