Number of insect = 70
Step-by-step explanation:
Given expression
Number of insect Number of mayflies
x [tex]\frac{3}{14}x[/tex]
According to problem
[tex]\frac{3}{14}x[/tex][tex]=15[/tex]
⇔[tex]x = \frac{15 \times 14}{3}[/tex]
⇔[tex]x = 70[/tex]
Number of insect = 70
