x:4 and 45:20 a.8 b.9 c.10

I assume these two ratios are supposed to be the same.

x:4 = 45:20
x/4 =45/20

times 4

x = 4(45/20) = 9

like i know the answer how i explain

x:4 = 45:20

Cross multiply the two middle numbers. Cross multiply the first and last numbers.

20x = 180

Solve for x.

x = 180/20

x = 9

oh so that's how i explain

Yes.

okay thx

so in the middle what does solve for x mean?

Solve for x means find out what x is.

x is approximately equal to y.

There is no y in this problem.

so 4 ios the x

okay mean so 4 is the x

i put so x is 4

No.

I told you earlier.

x = 9

okay thank u i got it

You are welcome.

i appreciate because i was lost explaning