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How do you simplify $15 d - 9 + 2 d$ $15d - 9 + 2d$ ?

1 Answer

Jul 10, 2015

Regroup to get $17 d - 9$ $17d-9$

Explanation:

$15 d - 9 + 2 d$ $15d - 9 +2d$
$XXXX$ $color(white)("XXXX")$ $= 15 d + 2 d - 9$ $=15d + 2d - 9$

$XXXX$ $color(white)("XXXX")$ $= (15 + 2) d - 9$ $= (15+2)d -9$

$XXXX$ $color(white)("XXXX")$ $= 17 d - 9$ $=17d-9$

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