I hope this helps you
2x-5=19
2x=24
x=12
I made a number line and drew it out -6,-5,-4,-3,-2,-1,0,1,2 and i counted how many i had to move over to get to 2 from -6 and i got 8
12/6 is 2
2 +2 is 4
The overall answer is 4
The x in y = mx + b represents the input, C.
