alyssakadas alyssakadas

14-02-2017
Mathematics

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Solving systems of equations using substitution p=q+3
4p+3q= -30

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Аноним Аноним

14-02-2017

4(q+3) + 3q=-30

4q+12+3q=-30

7q+12=-30

7q=-42

q=-6

p=q+3

p=-6+3

p=-3

Check

-3=-6+3 yes!

4(-3) + 3(-6)=-30

-12+-18=-30 Yes!

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