Question

5y - 4 = 9y + 8
If both equations are equal to each other, what is y?

Answer 1

y = -3

Explanation:

Step 1 - Subtract 5y from both sides of the equation:

5y - 4 - 5y = 9y + 8 - 5y

-4 = 4y + 8

Step 2 - Subtract 8 from both sides of the equation:

-4 - 8 = 4y + 8 - 8

-12 = 4y

Step 3 - swap the equation:

4y = -12

Step 4 - divide both sides of the equation by 4:

`(4y)/(4) = (-12)/(4)`

y = -3

Hope this helps!

Answer 2

y = -3

5y - 4 = 9y + 8

5(-3) - 4 = 9(-3) + 8

-19 = -19