Respuesta :
Answer:
15 boys
Step-by-step explanation:
7+3=10
10x5=50
there are 3 boys so
3x5=15
Answer:
35
Step-by-step explanation:
Assume 3x is the number of boys in the class.
And 7x as for the girls.
3x+7x=50
10x=50
x=5
Thus, 7*5=35 boys in the science class
Hope this is helpful!