Pls help me thx u bruh

4

Step-by-step explanation:

Rearrange the equation so that its y=5x+4. Now you know the y-intercept is 4.

Hope this helps :D

We have 12 liters of 8% acid solution to which we add an unknown amount of liters (x) of 20% acid solution to make a 16% acid solution.
.08 * 12 +.20x = .16 * (12 +x)
.96 + .20x = 1.92 + .16x
.04x = .96
x = 24 liters of 20% acid solution must be added

Source http://www.1728.org/mixture.htm
see example B