The answer to the question
Sum means add
5x+2x is at least 70
is at least means <u>></u>
so it is
5x+2x<u>></u>70
(5x+2x can be combined to get 7x and 7x<u>></u>70 divide 7 get x<u>></u>10)
-5 like minus 5 no mater the negetive for y
Hope this helped ")
You would need 31 Vans for everyone to be transported.
1. addition
2. subtraction
