Answer:
[tex] \huge{ \fbox{ \sf{5b + 9}}}[/tex]
Step-by-step explanation:
[tex] \star{ \text{( \: 3b + 5) + (2b + 4)}}[/tex]
[tex] \text{Step \: 1 \: : \sf{Remove \: the \: unnecessary \: parentheses}}[/tex]
[tex] \text{When \: there \: is \: a \: ( + ) \: in \: front \: of \: an \: expression \: in \: parentheses \:, there \: is \: no \: need \: to \: change \: the \: sign \: of \: each \: term \: in \: the \: expression.}[/tex]
[tex] \text{That \: means, \: the \: expression \: remains \: the \: same. \: Just \: you \: have \: to \: remove \: the \: parentheses.}[/tex]
[tex] \mapsto{ \sf{3b + 5 + 2b + 4}}[/tex]
[tex] \text{Step \: 2 \: : Collect \: like \: terms.}[/tex]
[tex] \text{Like \: terms \: are \: those \: which \: have \: the \: same \: base.}[/tex]
[tex] \mapsto{ \sf{3b + 2b + 5 + 4}}[/tex]
[tex] \mapsto{ \sf{5b + 5 + 4}}[/tex]
[tex] \text{ Step \: 3 \: : \sf{Add \: the \: numbers : 5 \: and \: 4}}[/tex]
[tex] \mapsto{ \boxed {\sf{ {5b + 9}}}}[/tex]
Hope I helped!
Best regards! :D
~[tex] \sf{TheAnimeGirl}[/tex]
