How do you solve #21 + m = 8 m - 3 ( 3 m - 3 )#?

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Answer 1 · 2018-05-04T08:19:29

By arranging the equation

#21 + m = 8m - 3(3m-3)#

First get rid of the paranthesis:

#21 + m = 8m -9m + 9#

Now collect terms including m on the lest hand side and numbers on the other:

#m - 8 m + 9 m = 9 - 21#

#2 m = -12#

#m = -12/2 = -6#

Your answer is #m = -6#