Question

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

Answer 1

y = -3

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

Answer 2

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

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.