Step 1: Y is equal to
so where ever you see a y in the equation 3x - 4y = -5 replace it with

3x - 4(
) = -5
Now all your variables are x and you can solve for x
Step 2: Distribute for to the numbers in the parentheses
3x - 3x - 8 = -5
Step 3: Combine like terms
0x - 8 = -5
0x = 3
Step 4: Isolate x
0x/0 = 3/0
3/0 is undefined
^^^ This means that there is no answer
If you look at the graph below you can see that these lines are parallel and therefore have no intersection point
Hope this helped!