Respuesta :
Answer:
1)x=25/7
2)16=x
Step-by-step explanation:
x/21=5/35 cross multiply
35x=25×5
35x=125
35x/35=125/35
x=25/7
12/15=x/20
12÷3/15÷3=x/20
4/5=x/20
4×4/5×4=x/20
16/20=x/20
16=x
Answer:
1)x=25/7
2)16=x
Step-by-step explanation:
x/21=5/35 cross multiply
35x=25×5
35x=125
35x/35=125/35
x=25/7
12/15=x/20
12÷3/15÷3=x/20
4/5=x/20
4×4/5×4=x/20
16/20=x/20
16=x