Question

Need help in number 22. Thanks for helping

Answer 1

3/15=2/n

Multiply up and down

3*n, 15*2= 3n and 30

Divide by 3 for 3n and 30

3n/3=30/3

n=10

Check answer by using substitution method

3/15=2/n

3/15=2/10

Reduce  by 3 for 3/15, Reduce  by 2 for 2/10

3/15=1/5

2/10= 1/5

Answer is n=10- G

Answer 2

N=10

You have to cross multiply