How do you simplify 12s - 4t + 7t - 3s?

1 Answer
Alan P.
Jul 8, 2015

12s-4t+7t-3s = 9s +3t
orcolor(white)("XXXX")color(white)("XXXX") =3(3s+t)

Explanation:

12s-4t+7t-3s
can be regrouped as
color(white)("XXXX")(12s-3s) +(7t-4t)

color(white)("XXXX")=(12-3)s +(7-4)t
color(white)("XXXX")=9s +3t

or, extracting a common factor of 3
color(white)("XXXX")=3(3s+t)

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