ΗΘΙΑ
procedimiento :
[tex]7b + 9 =5[/tex]
[tex]7b+9-9=5-9[/tex]
[tex]7b=-4[/tex]
[tex]\frac{7b}{7} \frac{-4}{7}[/tex]
[tex]b=-\frac{4}{7}[/tex]
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ΗΘΙΑ
procedimiento :
[tex]7b + 9 =5[/tex]
[tex]7b+9-9=5-9[/tex]
[tex]7b=-4[/tex]
[tex]\frac{7b}{7} \frac{-4}{7}[/tex]
[tex]b=-\frac{4}{7}[/tex]
salu2!!