Question

Aflati termenul necunoscut al proporției :
d)
$\frac{14}{25 \frac{1}{5} } = \frac{15}{2x - 1}$
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Answer 1

14/25 1/5=15/(2x-1)

14/126/5=15/(2x-1)

14×5/126=15/(2x-1)

5/9=15/(2x-1)

5(2x-1)=9×15

10x-5=135

10x=140

x=14