MATHS help?

The ratio of the number of orchids to the number of roses in a flower shop is 4:1.after selling 920 orchids and 20 roses there were twice as many roses as orchids lift in the shop.How many orchids were there in the shop? PLessh help!

MATHS help?
x=orchids, y=roses

x=4y

After selling 920 orchids and 20 roses

x-920 and y-20

Twice as many ROSES as orchids

2(x-920)=y-20

2x-1840=y-20

Substitute x=4y

8y-1840=y-20

7y=1820

y=260 roses orginally

x=260*4=1040 orchids originally

1040-920=120 orchids left
Reply:let the no. of orchids be x

let the no. of roses be y

x/y = 4/1

x = 4y --------------------equation (1)



after selling 920 orchids and 20 roses

no. of orchids = x-920

no. of roses = y-20



no. of orchids = twice no. of roses

x-920 = 2(y-20)

x-920 = 2y-40

4y-920 = 2y - 40

2y = 880

y= 440



no. of orchids = x = 4y = 4 * 440 = 1760 orchids



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