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Solve the proportion 4/5=28/x using two methods

Sagot :

luana
[tex]\frac{4}{5}=\frac{28}{x}\ \ \ \ |multiply\ by\ x\ each\ side\\\\ \frac{4}{5}x=28\ \ \ \ |Multiply\ by\ 5\ each\ side\\\\ 4x=140\ \ \ |:4\\\\ x=35\\\\\\ Cross\ multiplication\ method:\\\\ 4x=28*5\\\\ 4x=140\ \ \ |:4\\\\ x=35 [/tex]
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