Yves bought 420 tropical fish for a museum display. he bought 6 times as many parrotfish as angelfish. how many of each type of fish did he buy?

which is a system of equations to model the problem if x represents the number of angelfish yves bought and y represents the number of parrotfish he bought?

x + y = 6
y = 420x

x + 6y = 420
y = 6x

x – y = 420
y = 6x

x + y = 420
y = 6x

D is the right equation.

Step-by-step explanation:

Yves total number of fish is 420

x and y represent the number of fish

^ x + y = 420  (we know the equation is an addition form because of the key word  ''and'')

Then it says ''he bought 6 times as many parrot-fish (y) AS angelfish (x)

^ y = 6x  

54

step-by-step explanation:

6x9

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x