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svetoff [14.1K]
2 years ago
15

-3y-2=7 what is the value of y

Mathematics
2 answers:
tiny-mole [99]2 years ago
6 0

Answer:

y = -3

Step-by-step explanation:

Add 2 to each side to isolate the -3y. Doing this leaves you with -3y=9. You then divide each side leaving you with y = -3

babymother [125]2 years ago
4 0

Answer:

The equation has one solution at which y = -3.

Step-by-step explanation:

To find the value of y, we need to isolate it from the rest of the equation.

  1. Add 2 to both sides of the equation.
  2. Divide by -3 on both sides of the equation.
  3. Simplify the equation if necessary.

\displaystyle{-3y-2=7}\\\\-3y = 9\\\\\bold{y = -3}

We can check to make sure that y = -3 by substitution.

\displaystyle{-3(-3)-2 = 7}\\\\9-2=7\\\\7= 7 \ \checkmark

Because we got a true statement, we can determine that y = -3.

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