Tatinmegpmprawillo Tatinmegpmprawillo

08-11-2016
Mathematics

contestada

AB:BC is 3:4. Solve for x.

A.11
B.14
C.120
D.140

Respuesta :

alsteva alsteva

11-11-2016

AB:BC=3:4
90:(10x-20)=3:4
3(10x-20)=90×4
30x-60=360
30x=420
x=14

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