x = -1 - sqrt(23)
x = sqrt(23) - 1
Step-by-step explanation:
scale up :
.05
1/2
7
scale down :
13
25
102
7 gallons of pure acid and 14 gallons of 10% acid
Answer:
c
78
x = your age
400 - 2x = 244
subtract 400 from both sides of the equation:
-2x = -156
divide both sides by -2:
x = 78
