Answer:
81
Step-by-step explanation:
9^2 = 81 bc 9x9=81
14 to 21
2+3 is 5.
35 ÷5 is 7
2×7 is 14
3×7 is 21
Answer is in the file below
tinyurl.com/wpazsebu
X=2
Let A be the amount of 100% acid.
100A+20*(6)=40*(A+6)
100A+120=40A+240
60A=120
A=2 gallons
