1. Two thirds of a number is 12. What is three fourths of this number? 2. What is a number plus two seventh of it equal to 7?

1. Two thirds of a number is 12. What is three fourths of this number? 2. What is a number plus two seventh of it equal to 7?

(1)12÷2/3=18
18×3/4=13.5
(2)7÷(1+2/7)=49/9