1st box: 2a (subtract 2a from both sides)
2nd box: 3 (add 3 to both sides)
3rd box: 10 (add 7+3)
4th and 5th box: 2 (divide both by 2)
6th box: 5 (10/2=5)
Answer:

Step-by-step explanation:
first you take 60°/360°= 1/6 then you take 1/6 and multiple it by
and that equals
finally take
times the radius (6) and that should equal 
PLATO USERS #platolivesmatters
X = the dividend
x ÷ 7 = 13
x = 13x7
x = 91
324 because if you do 303/15 it’s 20.2 then you add that to 303 which is 323.2 but you can’t have .2 of a gallon so it’s 324