Lily is using dark power crystal to raise an army of zombies. Each crystal can raise 9 zombies. How many crystals does Lily need to 6,174 zombies?

686 crystals

Step-by-step explanation:

We can use ratios to solve

1 crystal         x crystals

=

9 zombies      6174 zombies

Using cross products

9x = 6174

Divide each side by 9

x = 6174/9

x =686

fa tha first one you gonna add y to both sides

it look like this

x-y+y=6+y

x=y+6

therefore your answer is

x =y+6

fa tha second one

you gonna flip tha equation

it gonna look like x-4y=y

then add 4 to both sides

it gonna look like tha

x-4 +4 =y +4

so therefore tha answer is x=y+4

step-by-step explanation:

7,24

step-by-step explanation: