Posted by im stuck on this one!! on Tuesday, January 18, 2011 at 10:55pm.
use substitution method
please step by step so that i could understand
- algebra 1 - MathMate, Tuesday, January 18, 2011 at 11:19pm
Substitution means we express one variable in terms of another, and substitute this expression into the second equation.
From (1), we have
subtract 2n from each side to get
Substitute m from (1a) into (2) to get:
-7n = -23 -5
-7n = -28
Substitute n from (2a) into (1a)
So m=-7, n=4
Substitute the values of m and n into equations (1) and (2) to verify that the solutions are correct:
- algebra 1 - im stuck on this one!!, Tuesday, January 18, 2011 at 11:25pm
THANKS!!!!!!! great explaining!!!
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