320g/100g H2O = x/200g H2O how do I get x?
320/100 = x/200
cross multiply
100x = 320*200
divide by 100
x =320*200/100
= 640g H20
The easiest way to isolate x is by cross multiplying.
multiply the numerator of one side by the denominator of the other side:
320x = 100(200)
320x = 20,000
divide both sides by 320:
x = 20,000/320 = 62.5
- .--
Comments
320/100 = x/200
cross multiply
100x = 320*200
divide by 100
x =320*200/100
= 640g H20
320/100 = x/200
The easiest way to isolate x is by cross multiplying.
multiply the numerator of one side by the denominator of the other side:
320x = 100(200)
320x = 20,000
divide both sides by 320:
x = 20,000/320 = 62.5
- .--