Math

Solve for 3x - 5y = 42 and - 3x - y = - 6

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- 3x - y = - 6

- 3x - y+y = - 6+y

-3x= - 6+y

-3x+6= - 6+y+6

-3x+6=y

3x - 5y = 42

3x - 5(-3x+6) = 42

3x - 5(-3x) (5)(+6) = 42

3x+15x+30=42

18x+30=42

18x+30-30=42-30

18x=12

18x/18=12/18

x=2/3

-3x+6=y

-3(2/3)+6=y

-3(2/3)+6=y

-2+6=y

4=y