The variable is how many tanks there are because he wants to know how many fish there are in the whole aquarium and we already know each tank contains five fishes but we just need to know how many tanks there are. :)
2nd one, y=2x+3
so subsitute y with 2x+3 in other equation
2x-(2x+3)=7
2x-2x-3=7
0-3=7
-3=7
false
no solution
(also, the slopes of the lines are the same and therefor they are paralell and differnet y intercepts so never intersect)
no solution
Easy you have to subtract 95 by 8 then you get your answer hope it helped!
28 degrees is the answer , 76+76= 152, 180-152+ 28
15 different meals because you can do 5 times 3 and get 15 meals.