Step-by-step explanation:
45+90+x=180
135+x=180
x=180-135
x=45
Answer:
50 liters
Step-by-step explanation:
If x is the volume of 20% acid, then:
x (0.20) + 20 (0.45) = (x + 20) (0.30)
0.2x + 9 = 0.3x + 6
3 = 0.1x
x = 30
30 liters of 20% acid are needed, so there will be a total of 50 liters of 30% acid.
The percent would be 29%. You need to move the decimal to the right twice.
Answer:
436x
Step-by-step explanation:
