-8y+5=-9y+4

Question

What is the solution and how do I get to it

Answer 1

-8y + 5 = -9y + 4

 

Add 9y to both sides:

 

 -8y + 5=-9y+4

 +9y       +9y

----------------

   y + 5 = 4

 

Subtract 5 from both sides:

 

y + 5 = 4

    - 5  -5

------------

y = -1

 

Now check it:

 

-8y + 5 = -9y + 4

-8*(-1) + 5 = -9*(-1) + 4

8 + 5 = 9 + 4

13 = 13

It checks!!