Posted by Candy on Wednesday, August 26, 2009 at 5:35pm.
how do you solve this equation: 12n=9(n+10)

math  Ms. Sue, Wednesday, August 26, 2009 at 5:49pm
12n=9(n+10)
12n = 9n + 90
12n  9n = 9n  9n + 90
3n = 90
n = ?

math  DrBob222, Wednesday, August 26, 2009 at 5:51pm
12n=9(n+10)
remove parentheses
12n = 9n+90
Move unknown (n) to the same side by subtracting 9n from both sides.
12n9n = 9n9n+90
combine terms.
3n=90
divide both sides by 3.
3n/3 = 90/3
n=?
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