herandylucas herandylucas

04-02-2014
Mathematics

Answered

Substitution how do u do it??

Substitution how do u do it?? class=

Verified Answer :

crisforp crisforp

05-02-2014

3x-(2x+7) = -9 <=> x -7 = -9 <=> x = -2; y = 2(-2) + 7 = 3.

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