How do you solve #7/12 = x/54#?

Question

1869 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-02-13T18:20:10

#x=31.5#

Since the 2 fractions are equal we can cross-multiply to obtain :

#12x=7xx54#

Now divide by 12 on both sides of the equation to get

#x=(7xx54)/12=31.5#

Answer 2 · 2016-02-14T14:39:02

#color(green)(x=31.5#

#color(blue)(7/12=x/54#

Cross multiply #color(orange)(a/b=c/d,ad=bc#

#12x=7(54)#

#12x=378#

#color(green)(x=378/12=126/4=63/2=31 1/2=31.5#