12x = 48 - 6y
10x = 38 - 6y

if the x=5, what is the value of y?

y = -2

Step-by-step explanation:

Substitute x for 5 in each equation. Then rearrange and isolate y.

12x = 48 - 6y

12(5) = 48 - 6y    Simplify

60 = 48 - 6y

60 - 48 = 48 - 48 - 6y   Subtract 48 from both sides

12 = -6y

12/-6 = -6y/-6   Divide both sides by -6

-2 = y    Answer

y = -2   Variable on left side

10x = 38 - 6y

10(5) = 38 - 6y    Simplify

50 = 38 - 6y

50 - 38 = 38 - 38 - 6y   Subtract 38 from both sides

12 = -6y

12/-6 = -6y/-6    Divide each side by -6

-2 = y

y = -2    Same answer.