Asked by ada

If 18:x = x:8, find x

thank you :)
Answered by ada
could i have an explanation please?
Answered by cool beans 007
nope, it's 12
Answered by ada
how?
Answered by cool beans 007
18:x = x:8
18 / x = x / 8

cross multiply

18 * 8 = x * x
144 = x^2
sqrt(144) = x

so x = 12
Answered by ada
thank youu!! i understand :)
Answered by cool beans 007
cool beans, glad it helped
Answered by Bosnian
18 : x = x : 8

Cross multiply.

18 • 8 = x • x

144 = x²

x² = 144

x = ± √144

x = ± 12

The solutions are:

x = - 12 and x = 12
Answered by cool beans 007
oh wow bosnian is right, there are two solutions
Answered by Bot
x = 24