Answer:
Reduce by cancelling common factors.
The simplified expression of this problem is -2/3
He should expand the 1/4 on the barker (x+12) then he will have 1/4x+3 = 2 then he should subtract the 3 from the 2 meaning he will be left with 1/4x = -1 and then he should multiply the left hand side and the right hand side with 4 in order to get rid from the 1/4 so the answer is x = -4
Answer: 45 ft
Step-by-step explanation:
and 15ft add 10ft to get 25ft
then subtract 70 from 25
Step-by-step explanation:
If x is the volume of pure water:
Initial + added = final
0.95 (840) + 0 (x) = 0.70 (840 + x)
798 = 588 + 0.70 x
x = 300
840 + x = 1140
You need to add 300 mL of pure water to obtain 1140 mL of the desired 70% solution.