Answer:
x=24
Step-by-step explanation:
By cross multiplying [tex]\frac{4}{5}[/tex] and [tex]\frac{x}{30}[/tex] we get
5x=30*4
5x=120
x=120/5
x=24 (which makes sense because in order to get a denominator of 30 from 5 you need to multiply it by 6, and then the numerator would also be multiplied by 6 (4*6=24) )
