4/5=x/20 solve for x?

(4/5) * (4/4) = 16/20
so, x=16

16/20 = x/20

x = 16

x=16

x=16 16/20 simplified by 4 = 4/5 ur answer is 16

4/5 = x/20
4 = 5(x/20)
4 = x/4
x = 4(4)
x = 16

5x=80
x=16

5*4=20 so x=4*4=16

4/5 = x/20
multiply both side with 20 --> 4/5 * 20 = x/20 * 20
16 = x

x = 16

you have to isolate x so to do that, you have to multiply both sides by 20. The 20's cancel each other out so you now have 20 * 4/5=x. Do the math and tha gives you 80/5=x. So 16=x. To check your work both sides should then match. 4/5 =.8 and 16/20 =.8 Hope this helps!!

x=16